[clang] Add missing intrinsics to cuda headers (PR #143664)

[Erich Keane via cfe-commits]

erichkeane wrote:

> Erich, is there a good point-of-contact at nvidia who can review CUDA intrinsic header changes in the future?

For the most part, we don't have ANYTHING to do with CUDA in clang as far as I know.  I also don't know much about CUDA, but I'll ping an internal slack channel to see if there is anyone who can help.

https://github.com/llvm/llvm-project/pull/143664