Merge "Add userfaultfd syscall in SECCOMP allowlist" am: 051b454ff1 am: 117f738b35

Original change: https://android-review.googlesource.com/c/platform/bionic/+/1629099

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4b5543eecc277dd96837b033f538afa18a91e419