build: Fix the build for 32-bit Linux platform

[0x676e67]

Compiling i686-unknown-linux-musl and other 32-bit Linux platforms reported an error because the publish crate did not include the file. Compiling normally after completing the file

tracing line:

boring/boring-sys/build/main.rs

Line 298 in bf0e21c

.join("src/util/32-bit-toolchain.cmake")

error: failed to run custom build command for `boring-sys v4.13.0`

Caused by:
  process didn't exit successfully: `/home/rust/src/target/release/build/boring-sys-c4cc99b1cc4d49f5/build-script-main` (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=BORING_BSSL_PATH_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_PATH_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_INCLUDE_PATH_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_INCLUDE_PATH_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_INCLUDE_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_INCLUDE_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_SOURCE_PATH_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_SOURCE_PATH_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_SOURCE_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_SOURCE_PATH
  cargo:rerun-if-env-changed=BORING_BSSL_PRECOMPILED_BCM_O_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_PRECOMPILED_BCM_O_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_PRECOMPILED_BCM_O
  cargo:rerun-if-env-changed=BORING_BSSL_PRECOMPILED_BCM_O
  cargo:rerun-if-env-changed=BORING_BSSL_ASSUME_PATCHED_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_ASSUME_PATCHED_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_ASSUME_PATCHED
  cargo:rerun-if-env-changed=BORING_BSSL_ASSUME_PATCHED
  cargo:rerun-if-env-changed=BORING_BSSL_SYSROOT_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_SYSROOT_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_SYSROOT
  cargo:rerun-if-env-changed=BORING_BSSL_SYSROOT
  cargo:rerun-if-env-changed=BORING_BSSL_COMPILER_EXTERNAL_TOOLCHAIN_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=BORING_BSSL_COMPILER_EXTERNAL_TOOLCHAIN_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_BORING_BSSL_COMPILER_EXTERNAL_TOOLCHAIN
  cargo:rerun-if-env-changed=BORING_BSSL_COMPILER_EXTERNAL_TOOLCHAIN
  cargo:rerun-if-env-changed=DEBUG_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=DEBUG_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_DEBUG
  cargo:rerun-if-env-changed=DEBUG
  cargo:rerun-if-env-changed=OPT_LEVEL_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=OPT_LEVEL_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_OPT_LEVEL
  cargo:rerun-if-env-changed=OPT_LEVEL
  cargo:rerun-if-env-changed=ANDROID_NDK_HOME_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=ANDROID_NDK_HOME_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_ANDROID_NDK_HOME
  cargo:rerun-if-env-changed=ANDROID_NDK_HOME
  cargo:rerun-if-env-changed=CMAKE_TOOLCHAIN_FILE_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=CMAKE_TOOLCHAIN_FILE_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_CMAKE_TOOLCHAIN_FILE
  cargo:rerun-if-env-changed=CMAKE_TOOLCHAIN_FILE
  Initialized empty Git repository in /home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out/boringssl/.git/

  CMAKE_GENERATOR_i686-unknown-linux-musl = None
  CMAKE_GENERATOR_i686_unknown_linux_musl = None
  TARGET_CMAKE_GENERATOR = None
  CMAKE_GENERATOR = None
  CMAKE_PREFIX_PATH_i686-unknown-linux-musl = None
  CMAKE_PREFIX_PATH_i686_unknown_linux_musl = None
  TARGET_CMAKE_PREFIX_PATH = None
  CMAKE_PREFIX_PATH = None
  CMAKE_i686-unknown-linux-musl = None
  CMAKE_i686_unknown_linux_musl = None
  TARGET_CMAKE = None
  CMAKE = None
  running: cd "/home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out/build" && CMAKE_PREFIX_PATH="" LC_ALL="C" "cmake" "/home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out/boringssl" "-DCMAKE_CROSSCOMPILING=true" "-DCMAKE_C_COMPILER_TARGET=i686-unknown-linux-musl" "-DCMAKE_CXX_COMPILER_TARGET=i686-unknown-linux-musl" "-DCMAKE_ASM_COMPILER_TARGET=i686-unknown-linux-musl" "-DCMAKE_TOOLCHAIN_FILE=/home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out/boringssl/src/util/32-bit-toolchain.cmake" "-DCMAKE_INSTALL_PREFIX=/home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m32 -march=i686 -Wl,-melf_i386" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m32 -march=i686 -Wl,-melf_i386" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m32 -march=i686 -Wl,-melf_i386" "-DCMAKE_BUILD_TYPE=Release"
  -- Configuring incomplete, errors occurred!

  --- stderr
  hint: Using 'master' as the name for the initial branch. This default branch name
  hint: is subject to change. To configure the initial branch name to use in all
  hint: of your new repositories, which will suppress this warning, call:
  hint: 
  hint:         git config --global init.defaultBranch <name>
  hint: 
  hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
  hint: 'development'. The just-created branch can be renamed via this command:
  hint: 
  hint:         git branch -m <name>

  CMake Error at /usr/share/cmake-3.22/Modules/CMakeDetermineSystem.cmake:130 (message):
    Could not find toolchain file:
    /home/rust/src/target/i686-unknown-linux-musl/release/build/boring-sys-79768b93eb799a94/out/boringssl/src/util/32-bit-toolchain.cmake
  Call Stack (most recent call first):
    CMakeLists.txt:19 (project)


  CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
  CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
  thread 'main' panicked at /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cmake-0.1.54/src/lib.rs:1119:5:

  command did not execute successfully, got: exit status: 1

  build script failed, must exit now
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[rushilmehra]

Thanks!