update x264 wrapper.

patch by Robert Swain.

probably this change is caused by the flags2 default change
why ohh why does noone run the regression tests before cvs commit :(

Originally committed as revision 4845 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/libav.regression.ref

@@ -16,7 +16,7 @@ c9050b51f6d6636cdda3160d43463bc3 *./data/b-libav.ts
 57a8dfc7926802bb337a9d8918de94a8 *./data/b-libav.swf
   41816 ./data/b-libav.swf
 ./data/b-libav.swf CRC=0x2b273fea
-8f908b4651a7e5915f0f6e505bafb0b1 *./data/b-libav.ffm
+0026c4e2528ff8f71b79ef53d38cc04d *./data/b-libav.ffm
  389120 ./data/b-libav.ffm
 ./data/b-libav.ffm CRC=0x688bd1eb
 794934a02582f8dfc85d1856514cf37c *./data/b-libav.flv