[llvm] [Triple] Add libc-less `x32` environment (PR #202795)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

are there any actual differences in x32 vs gnux32? can't we just map x32 uses to Triple::GNUX32?

https://github.com/llvm/llvm-project/pull/202795