roll libyuv from r1521 to r1523
roll libyuv from r1521 to r1523

Adds initial AVX3 detection support and reduce detection code
call by 1 byte per call by checking for zero instead of one.

Contains the following revisions:
https://chromium.googlesource.com/libyuv/libyuv/+log/ad36ba5c..2844662e

R=xhwang@chromium.org
BUG=libyuv:514

Review URL: https://codereview.chromium.org/1426683003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#356191}

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