BUG=434
TESTED=gclient sync and do build with vs2015
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/47079004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1393 16f28f9a-4ce2-e073-06de-1de4eb20be90