[compiler-rt] [Clang] Support target attr specifying CPU (PR #68678)

[via llvm-commits]

https://github.com/DanielKristofKiss requested changes to this pull request.

Could you please update the documentation too? ( https://clang.llvm.org/docs/AttributeReference.html#id587 lives here `clang/include/clang/Basic/AttrDocs.td` )


https://github.com/llvm/llvm-project/pull/68678