gst1-plugins-ugly: fix x264 compile failure

Add upstream patch to fix compile with latest x264 library.

Fixes [1]:

  gstx264enc.c: In function 'plugin_init':
  gstx264enc.c:2900:36: error: 'x264_bit_depth' undeclared (first use in this function); did you mean 'x264_picture_t'?
     default_vtable.x264_bit_depth = &x264_bit_depth;
                                      ^~~~~~~~~~~~~~
                                      x264_picture_t

[1] http://autobuild.buildroot.net/results/a766a28c584534b6a30839cfd98428d840bce3f2



Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>