Roll libvpx to fd3078fd8fe7.

Relevant updates:

fd3078fd8fe7: Fix to Valgrind memory issues.

4cf4c94ad166: Fix to rd cost computation for motion vector bias 
(issue: http://code.google.com/p/webm/issues/detail?id=486)

4c53bacce4a9: post-proc: deblock filter optimization
(issues: http://code.google.com/p/webm/issues/detail?id=480
         http://code.google.com/p/webm/issues/detail?id=479)
Review URL: https://webrtc-codereview.appspot.com/921007

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@2978 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed