libmpeg2: Add patches from Handbrake project

libmpeg2 is abandoned upstream.

Patches:
- A00: Fix tag handling on frames

pkgs/development/libraries/libmpeg2/default.nix

@@ -1,13 +1,18 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "libmpeg2-0.5.1";
+  name = "libmpeg2-0.5.1p4";
   
   src = fetchurl {
     url = "http://libmpeg2.sourceforge.net/files/${name}.tar.gz";
     sha256 = "1m3i322n2fwgrvbs1yck7g5md1dbg22bhq5xdqmjpz5m7j4jxqny";
   };
 
+  # From Handbrake - Project seems unmaintained
+  patches = [
+    ./A00-tags.patch
+  ];
+
   meta = {
     homepage = http://libmpeg2.sourceforge.net/;
     description = "A free library for decoding mpeg-2 and mpeg-1 video streams";