Support Deps / libyuv / dd2d512e5af

Commits

fbarchard@google.com committed dd2d512e5af06 Nov 2012

420 subsampler
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/935012

git-svn-id: http://libyuv.googlecode.com/svn/trunk@478 16f28f9a-4ce2-e073-06de-1de4eb20be90