Run the Bazel bootstrap test in C++17 mode

Most of Bazel code already builds in C++17 mode (bazelbuild@ba38aa2) but the bootstrap test does not. This causes failures on Windows if you try to use C++17 features, because the MSVC default version is too old.

PiperOrigin-RevId: 661142299
Change-Id: Ifb1f50bb904fb08c6aaae017c595d0b23264ea12

compile.sh

@@ -56,6 +56,10 @@ if [[ $PLATFORM == "darwin" ]] && \
   EXTRA_BAZEL_ARGS="${EXTRA_BAZEL_ARGS-} --define IPHONE_SDK=1"
 fi
 
+if [[ $PLATFORM == "windows" ]]; then
+  EXTRA_BAZEL_ARGS="${EXTRA_BAZEL_ARGS-} --cxxopt=/std:c++17 --host_cxxopt=/std:c++17"
+fi
+
 source scripts/bootstrap/bootstrap.sh
 
 new_step 'Building Bazel with Bazel'