Build BOLT

Author: Kobzol

src/bootstrap/src/core/build_steps/llvm.rs

@@ -448,6 +448,7 @@ impl Step for Llvm {
         if builder.config.llvm_clang {
             enabled_llvm_projects.push("clang");
         }
+        enabled_llvm_projects.push("bolt");
 
         // We want libxml to be disabled.
         // See https://github.com/rust-lang/rust/pull/50104

src/bootstrap/src/lib.rs

@@ -57,6 +57,8 @@ pub use utils::change_tracker::{
 use crate::core::build_steps::vendor::VENDOR_DIR;
 
 const LLVM_TOOLS: &[&str] = &[
+    "llvm-bolt",
+    "merge-fdata",
     "llvm-cov",      // used to generate coverage report
     "llvm-nm",       // used to inspect binaries; it shows symbol names, their sizes and visibility
     "llvm-objcopy",  // used to transform ELFs into binary format which flashing tools consume