BUG=223
TEST=libyuv_unittest --gtest_filter=*I444ToARGB*
Review URL: https://webrtc-codereview.appspot.com/1353004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@680 16f28f9a-4ce2-e073-06de-1de4eb20be90