Disable GNU extensions during CUDA compilation, Since: 1. We don't need them and 2.  Clang < 11 doesn't support compiling with these extensions.
Disable GNU extensions during CUDA compilation, Since: 1. We don't need them and 2.  Clang < 11 doesn't support compiling with these extensions.

See also: https://reviews.llvm.org/D78392

fixup

eyalroz/cuda-api-wrappers