Fix run-make tests

Author: Kobzol

Diff for: tests/run-make/broken-pipe-no-ice/rmake.rs

@@ -25,7 +25,7 @@ enum Binary {
 }
 
 fn check_broken_pipe_handled_gracefully(bin: Binary, mut cmd: Command) {
-    let (reader, writer) = std::io::pipe().unwrap();
+    let (reader, writer) = std::pipe::pipe().unwrap();
     drop(reader); // close read-end
     cmd.stdout(writer).stderr(Stdio::piped());
 

Diff for: tests/run-make/rustdoc-default-output/rmake.rs

@@ -3,10 +3,10 @@
 // ensures the output of rustdoc's help menu is as expected.
 // See https://github.com/rust-lang/rust/issues/88756
 
-use run_make_support::{bare_rustdoc, diff};
+use run_make_support::{diff, rustdoc};
 
 fn main() {
-    let out = bare_rustdoc().run().stdout_utf8();
+    let out = rustdoc().run().stdout_utf8();
     diff()
         .expected_file("output-default.stdout")
         .actual_text("actual", out)

Diff for: tests/run-make/version-verbose-commit-hash/rmake.rs

@@ -5,13 +5,13 @@
 
 //@ needs-git-hash
 
-use run_make_support::{bare_rustc, bare_rustdoc, regex};
+use run_make_support::{bare_rustc, regex, rustdoc};
 
 fn main() {
     let out_rustc =
         bare_rustc().arg("--version").arg("--verbose").run().stdout_utf8().to_lowercase();
     let out_rustdoc =
-        bare_rustdoc().arg("--version").arg("--verbose").run().stdout_utf8().to_lowercase();
+        rustdoc().arg("--version").arg("--verbose").run().stdout_utf8().to_lowercase();
     let re =
         regex::Regex::new(r#"commit-hash: [0-9a-f]{40}\ncommit-date: [0-9]{4}-[0-9]{2}-[0-9]{2}"#)
             .unwrap();