[lld] [llvm] [LIT][LLD] Fix Windows test failures due to path separator mismatches (PR #179865)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

Yep. A buildbot would be appropriate for this if you have some extra hardware. I don't think premerge CI makes sense for this kind of configuration.

https://github.com/llvm/llvm-project/pull/179865