Scale down by 4x with box filter. Fix for 1 pixel wide bilinear filter.  Fix for I420ToARGB overread on V plane that causes valgrind fail. BUG=none TESTED=gcl try libyuv_r911 --bot=linux_valgrind R=andrew@webrtc.org
Scale down by 4x with box filter. Fix for 1 pixel wide bilinear filter.  Fix for I420ToARGB overread on V plane that causes valgrind fail.
BUG=none
TESTED=gcl try libyuv_r911 --bot=linux_valgrind
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/5459004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@5305 4adac7df-926f-26a2-2b94-8c16560cd09d

TimothyGu/libilbc,mwgoldsmith/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/ilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,mwgoldsmith/ilbc,mwgoldsmith/libilbc,TimothyGu/libilbc,mwgoldsmith/ilbc,mwgoldsmith/ilbc,mwgoldsmith/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,mwgoldsmith/libilbc