[clang] [llvm] [Clang] Add `-fsanitize-prefix-map` for remapping source paths in sanitizer metadata (PR #186908)

[Björn Svensson via cfe-commits]

bjosv wrote:

Thanks @petrhosek for the suggestion (and sorry for the late response..)
I created the PR #201803 with the flag `-fsanitize-compilation-dir=` as suggested, it it like what you had in mind?


https://github.com/llvm/llvm-project/pull/186908