Roll libyuv from 1569 to 1571 for UBSan fixes.
Roll libyuv from 1569 to 1571 for UBSan fixes.

ubsan was flagging int overflows as errors.
This CL rolls 4 fixes to allow UBSan to build and pass.

Full list of changes
https://chromium.googlesource.com/libyuv/libyuv/+log/ad71738..903c91c

R=magjed@chromium.org, pbos@chromium.org
BUG=libyuv:563,webrtc:5124,libyuv:561

Review URL: https://codereview.chromium.org/1664633002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#373207}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk