Remove bayer format support from libyuv.  This format is very rare and used on legacy hardware.  Its not well optimized and has bugs related to odd widths.  Removing the format will allow tests to pass under more circumstances, run faster and allow focus on higher priority quality and performance issues.
BUG=301
TESTED=local unittests build/pass on windows gyp build.
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/38059004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1270 16f28f9a-4ce2-e073-06de-1de4eb20be90