[lld] [lld][ELF] Support LLVM repository and LLVM revision information (PR #97323)

[Fangrui Song via llvm-commits]

MaskRay wrote:

We could use a comma to be consistent with other LLVM binary utilities: `llvm-objcopy, compatible with GNU objcopy`/
`llvm-nm, compatible with GNU nm`.

https://github.com/llvm/llvm-project/pull/97323