GNU IceCat: Really fix.

svn path=/nixpkgs/trunk/; revision=19716

pkgs/top-level/all-packages.nix

···
 
   icecatXulrunner3 = lowPrio (import ../applications/networking/browsers/icecat-3 {
     application = "xulrunner";
-    inherit fetchurl stdenv xz pkgconfig perl zip libjpeg libpng zlib cairo
+    inherit fetchurl stdenv pkgconfig perl zip libjpeg libpng zlib cairo
       python dbus dbus_glib freetype fontconfig bzip2 xlibs alsaLib;
     inherit (gnome) libIDL libgnomeui gnomevfs gtk pango;
     inherit (pythonPackages) ply;