Fix compiletest and rustc-dev-guide

Author: Kobzol

src/doc/rustc-dev-guide/src/building/bootstrapping/writing-tools-in-bootstrap.md

@@ -4,7 +4,7 @@ There are three types of tools you can write in bootstrap:
 
 - **`Mode::ToolBootstrap`**
   Use this for tools that don’t need anything from the in-tree compiler and can run with the stage0 `rustc`.
-  The output is placed in the "stage0-bootstrap-tools" directory. This mode is for general-purpose tools built
+  The output is placed in the "bootstrap-tools" directory. This mode is for general-purpose tools built
   entirely with the stage0 compiler, including target libraries and only works for stage 0.
 
 - **`Mode::ToolStd`**

src/tools/compiletest/src/runtest/run_make.rs

@@ -12,7 +12,7 @@ impl TestCx<'_> {
         // For `run-make` V2, we need to perform 2 steps to build and run a `run-make` V2 recipe
         // (`rmake.rs`) to run the actual tests. The support library is already built as a tool rust
         // library and is available under
-        // `build/$HOST/stage0-bootstrap-tools/$TARGET/release/librun_make_support.rlib`.
+        // `build/$HOST/bootstrap-tools/$TARGET/release/librun_make_support.rlib`.
         //
         // 1. We need to build the recipe `rmake.rs` as a binary and link in the `run_make_support`
         //    library.
@@ -63,7 +63,7 @@ impl TestCx<'_> {
         //
         // ```
         // build/<target_triple>/
-        // ├── stage0-bootstrap-tools/
+        // ├── bootstrap-tools/
         // │   ├── <host_triple>/release/librun_make_support.rlib   // <- support rlib itself
         // │   ├── <host_triple>/release/deps/                      // <- deps
         // │   └── release/deps/                                    // <- deps of deps
@@ -72,7 +72,7 @@ impl TestCx<'_> {
         // FIXME(jieyouxu): there almost certainly is a better way to do this (specifically how the
         // support lib and its deps are organized), but this seems to work for now.
 
-        let tools_bin = host_build_root.join("stage0-bootstrap-tools");
+        let tools_bin = host_build_root.join("bootstrap-tools");
         let support_host_path = tools_bin.join(&self.config.host).join("release");
         let support_lib_path = support_host_path.join("librun_make_support.rlib");