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

[Reid Kleckner via cfe-commits]

https://github.com/rnk approved this pull request.

@erichkeane, thanks for looking into it, no worries if nobody gets back. I think we should go ahead and land this in the mean time.

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