BUG=none
TEST=set LIBYUV_WIDTH=320 set LIBYUV_HEIGHT=90 libyuvTest.ARGBScaleFrom640x360_Bilinear
Review URL: https://webrtc-codereview.appspot.com/1477006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@695 16f28f9a-4ce2-e073-06de-1de4eb20be90