[llvm] [GitHub] Add llvm and bolt PR labels (PR #65509)

[Arthur Eubanks via llvm-commits]

================
@@ -34,6 +34,12 @@ HLSL:
   - clang/**/*HLSL*
   - llvm/**/Frontend/HLSL/**/*
 
+bolt:
+  - bolt/**/*
+
+llvm:
+  - llvm/**/*
+
 lld:
----------------
aeubanks wrote:

I don't see a pr-subscribers-lld

https://github.com/llvm/llvm-project/pull/65509