[clang] [Clang] Disable C++ exceptions by default for GPU targets (PR #205402)

[Ingo Müller via cfe-commits]

ingomueller-net wrote:

I think I got it. We use slightly different defaults for `-fopenmp` internally. I guess that's our problem, so nevermind.

https://github.com/llvm/llvm-project/pull/205402