now that libyuv requires newer nacl compiler, bundles can be assumed and bundle align macro can be removed.  no impact on code gen.
BUG=none
TESTED=validator still passes
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/30019004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1150 16f28f9a-4ce2-e073-06de-1de4eb20be90