[clang] [Driver] Fix implicit-check-not regex (PR #121221)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

@MaskRay in case you have a nicer suggestion how to implement this check in better way.
I'd like to force match of all libclang_rt. except specific list.

With `([^b]..|.[^u].|..[^i]).*` I can exclude only one, and expressions like `(?!(ABC|XYZ)).*`, are not supported


https://github.com/llvm/llvm-project/pull/121221