static ffmpeg build: restore x264 copyright

contrib/ffmpeg/vendor/x264-anonymize.patch

@@ -1,13 +1,13 @@
---- x264/encoder/set.c	2012-05-04 22:45:03.000000000 +0200
-+++ x264/encoder/set.c	2012-05-05 14:23:42.779901918 +0200
-@@ -574,9 +574,7 @@
-     CHECKED_MALLOC( payload, 200 + strlen( opts ) );
-
+--- x264/encoder/set.c 2012-10-28 21:08:02.000000000 +0000
++++ x264/encoder/set.c 2012-10-28 21:10:55.146563398 +0000
+@@ -575,8 +575,8 @@
+
      memcpy( payload, uuid, 16 );
--    sprintf( payload+16, "x264 - core %d%s - H.264/MPEG-4 AVC codec - "
+     sprintf( payload+16, "x264 - core %d%s - H.264/MPEG-4 AVC codec - "
 -             "Copy%s 2003-2012 - http://www.videolan.org/x264.html - options: %s",
 -             X264_BUILD, X264_VERSION, HAVE_GPL?"left":"right", opts );
-+    sprintf( payload+16, "x264 - core %d%s", X264_BUILD, X264_VERSION);
++             "Copy%s 2003-2012 - http://www.videolan.org/x264.html",
++             X264_BUILD, X264_VERSION, HAVE_GPL?"left":"right" );
      length = strlen(payload)+1;
-
+ 
      x264_sei_write( s, (uint8_t *)payload, length, SEI_USER_DATA_UNREGISTERED );