libyuv roll to r888 with valgrind overread fixes.
BUG=none
TEST=try bots
R=mflodman@chromium.org, wjia@chromium.org

Review URL: https://codereview.chromium.org/101673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239240 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239240
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239241 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239241