Disable libyuv MirrorTest due to crashes on Linux 32 bit.
Disable libyuv MirrorTest due to crashes on Linux 32 bit.

See http://code.google.com/p/webrtc/issues/detail?id=335 for more info.

BUG=
TEST=

Review URL: https://webrtc-codereview.appspot.com/487003

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@2017 4adac7df-926f-26a2-2b94-8c16560cd09d

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