[clang] Driver: Accept the --gcc-install-dir option multiple times (PR #71446)

[Fangrui Song via cfe-commits]

MaskRay wrote:

I think I have expressed I wanted to say... The new probing semantics seems really unusual to me. I do not feel that how path-related options usually behave.

https://github.com/llvm/llvm-project/pull/71446