expat: 2.1.0 -> 2.1.1

Also remove CVE patch merged upstream and enable tests.

pkgs/development/libraries/expat/default.nix

@@ -1,15 +1,13 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "expat-2.1.0";
+  name = "expat-2.1.1";
 
   src = fetchurl {
-    url = "mirror://sourceforge/expat/${name}.tar.gz";
-    sha256 = "11pblz61zyxh68s5pdcbhc30ha1b2vfjd83aiwfg4vc15x3hadw2";
+    url = "mirror://sourceforge/expat/${name}.tar.bz2";
+    sha256 = "0ryyjgvy7jq0qb7a9mhc1giy3bzn56aiwrs8dpydqngplbjq9xdg";
   };
 
-  patches = [ ./CVE-2015-1283.patch ];
-
   outputs = [ "dev" "out" ]; # TODO: fix referrers
   outputBin = "dev";
 
@@ -17,6 +15,8 @@ stdenv.mkDerivation rec {
 
   outputMan = "dev"; # tiny page for a dev tool
 
+  doCheck = true;
+
   meta = with stdenv.lib; {
     homepage = http://www.libexpat.org/;
     description = "A stream-oriented XML parser library written in C";