[libc-commits] [libc] [libc][cmake] make i386 distinct from x86_64 (PR #114477)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

FWIW, I do plan to flush out the entrypoints and headers text files, but not in this PR.

https://github.com/llvm/llvm-project/pull/114477