[flang] [mlir] [clang] [Flang][OpenMP][MLIR] Add support for -nogpulib option (PR #71045)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

We have the buildbot now up in staging: https://lab.llvm.org/staging/#/builders/188

https://github.com/llvm/llvm-project/pull/71045