Updated Haskell packages.

- fgl-visualize: added meta.maintainers
 - gtk2hs-buildtools: added version 0.12.3
 - network-conduit: added version 0.4.0
 - path-pieces: updated to version 0.1.1
 - void: added version 0.5.5

svn path=/nixpkgs/trunk/; revision=33551

pkgs/development/libraries/haskell/fgl-visualize/default.nix

@@ -9,5 +9,6 @@ cabal.mkDerivation (self: {
     description = "Convert FGL graphs to dot (graphviz) files";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.andres ];
   };
 })