Make it possible to x install Cranelift and LLVM bitcode linker

Author: Kobzol

src/bootstrap/src/core/builder/mod.rs

@@ -1221,6 +1221,8 @@ impl<'a> Builder<'a> {
                 install::Miri,
                 install::LlvmTools,
                 install::Src,
+                install::RustcCodegenCranelift,
+                install::LlvmBitcodeLinker
             ),
             Kind::Run => describe!(
                 run::BuildManifest,

src/bootstrap/src/core/builder/tests.rs

@@ -2911,6 +2911,9 @@ mod snapshot {
         [build] rustc 1 <host> -> cargo-miri 2 <host>
         [dist] rustc 1 <host> -> miri 2 <host>
         [dist] src <>
+        [build] rustc 1 <host> -> rustc_codegen_cranelift 2 <host>
+        [dist] rustc 1 <host> -> rustc_codegen_cranelift 2 <host>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <host>
         ");
     }