[llvm] [openmp] [OpenMP][clang] 6.0: num_threads strict (part 2: device runtime) (PR #146404)

[Robert Imschweiler via llvm-commits]

ro-i wrote:

Ping (part 3 is approved and all this can be merged as soon as this is approved, too :) )

https://github.com/llvm/llvm-project/pull/146404