flac: update, enable tests

Fix includes in VLC.
Tried a few other programs using it, seems fine.

pkgs/applications/audio/flac/default.nix

@@ -1,25 +1,19 @@
 { stdenv, fetchurl, libogg }:
 
 stdenv.mkDerivation rec {
-  name = "flac-1.2.1";
+  name = "flac-1.3.0";
 
   src = fetchurl {
-    url = mirror://sourceforge/flac/flac-1.2.1.tar.gz;
-    sha256 = "1pry5lgzfg57pga1zbazzdd55fkgk3v5qy4axvrbny5lrr5s8dcn";
+    url = "http://downloads.xiph.org/releases/flac/${name}.tar.xz";
+    sha256 = "1p0hh190kqvpkbk1bbajd81jfbmkyl4fn2i7pggk2zppq6m68bgs";
   };
 
   buildInputs = [ libogg ];
 
-  patches =
-    [ # Fix for building on GCC 4.3.
-      (fetchurl {
-        url = "http://sourceforge.net/p/flac/patches/_discuss/thread/9d4c7504/d8ea/attachment/flac-1.2.1-gcc-4.3-includes.patch";
-        sha256 = "1m6ql5vyjb2jlp5qiqp6w0drq1m6x6y3i1dnl5ywywl3zd36k0mr";
-      })
-    ];
+  doCheck = true; # takes lots of time but will be run rarely (small build-time closure)
 
   meta = {
-    homepage = http://flac.sourceforge.net;
+    homepage = http://xiph.org/flac/;
     description = "Library and tools for encoding and decoding the FLAC lossless audio file format";
   };
 }