[roll] Roll fuchsia [roll] Roll llvm-project/libc 791fb84..fac008f (9 commits)

fac008f:https://llvm.googlesource.com/llvm-project/libc/+/fac008f70cef3cb97484ec4615f57cfd9046da07 [libc][freebsd] initialize freebsd support (#124459)
09809ee:https://llvm.googlesource.com/llvm-project/libc/+/09809eeb00d0d5838c6f00678e8c01a817d12638 [libc][mathvec] Add exhaustive tester for SIMD math routines (#189488)
04eb131:https://llvm.googlesource.com/llvm-project/libc/+/04eb131ac58d4f80191f60fdf1d9490c5fdda91e [libc] Remove broken __builtin_aarch64_wsr fallback in set_thread_ptr (#197295)
39043b6:https://llvm.googlesource.com/llvm-project/libc/+/39043b6d18881a4e1f07e26060e9192f29a3e877 [libc] implement putwc (#196165)
2bd0afe:https://llvm.googlesource.com/llvm-project/libc/+/2bd0afe8681640534f47da078c1b238f7b932365 [libc] implement getwchar (#196164)
daff24a:https://llvm.googlesource.com/llvm-project/libc/+/daff24acad8533252fcfee6eeb0e3677041aa330 [libc][NFC] Fix typos in time.yaml keys for header generation (#198551)
3bbc865:https://llvm.googlesource.com/llvm-project/libc/+/3bbc8658f79ff4a41c33a337c31f13c8870a2304 [libc] implement fgetws (#196161)
e6e0adb:https://llvm.googlesource.com/llvm-project/libc/+/e6e0adb8de2335347769d7414939e93c6aa6a4cc [libc] implement fputws (#196160)
d5e973f:https://llvm.googlesource.com/llvm-project/libc/+/d5e973fe2c5e48fa313b45c21d0339491055b6a9 [libc] implement fputwc (#196158)

Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1617398
Original-Original-Revision: dec1937a3220ef3879f2e7d77f04f2a51936e268
GitOrigin-RevId: edc05155e707603920e8cd4335242ac602390262
Change-Id: I851c1eafd4d4e774d558b3bb89934b84226b9c91
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1618828
Cr-Commit-Position: refs/heads/main@{#193054}