argb scale 2x upsample with specialization for 25/75%
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/938014

git-svn-id: http://libyuv.googlecode.com/svn/trunk@486 16f28f9a-4ce2-e073-06de-1de4eb20be90
5 files changed