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

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

I posted such a change in https://github.com/llvm/llvm-project/pull/97698, and made a PR to Meson to loosen the check now in https://github.com/mesonbuild/meson/pull/13383.

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