[clang] [llvm] [Clang][OpenMP] Handled `NonContig` Descriptor `DimCount` (PR #181987)

[Nick Sarnie via cfe-commits]

sarnex wrote:

Can we merge this? It may fix test fails caused by https://github.com/llvm/llvm-project/pull/176708 

https://github.com/llvm/llvm-project/pull/181987