[lld] [LLD][COFF] Add -build-id flag to genrate .buildid section. (PR #71433)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo commented:

Looks mostly reasonable to me, thanks! A couple comments below.

Also, you've got a typo in the subject, "genrate".

https://github.com/llvm/llvm-project/pull/71433