This is done to make UBSan testing more convenient in integration with projects using WebRTC
Some blacklist entries were obsolete so don't need a replacement
Also fix one of the warnings (thanks, kwiberg@)
BUG=webrtc:8189, webrtc:5486, webrtc:5491
Review-Url: https://codereview.webrtc.org/3009123002
Cr-Commit-Position: refs/heads/master@{#19682}