[clang] [llvm] Clang: emit llvm.minnum and llvm.maxnum with nsz always (PR #113133)

[Matt Arsenault via cfe-commits]

arsenm wrote:

> nsz is missing for `__builtin_elementwise_min`. I am working on it.

I'm not sure that's a good idea. For fmin/fmax it seems OK, but this doesn't take the libm name 

https://github.com/llvm/llvm-project/pull/113133