[clang] [Clang] Remap paths in OpenMP runtime calls (#82541) (PR #141250)

[Dan McGregor via cfe-commits]

dankm wrote:

@jdoerfert it looks like you wrote the original code I'm modifying here, so I'd like your feedback. Don't know who else would be interested here.

https://github.com/llvm/llvm-project/pull/141250