Merge "libc: simplify ssse3 detection" into main am: 9cdc2c6b16

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3262113

Change-Id: I1fb88a268a6bd4597e233652fb538a37cb877a78
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>