Merge "libc: swap to llvm-libc for 8 fns on x86_64" into main am: 706487c70f

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3363339

Change-Id: I3fb0e7dfe1f834d62320c2784ce56efa8b96b143
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>