fontconfig: split into multiple outputs

Fixed all 'fontconfig}' references as well, hopefully, ugh!

pkgs/development/libraries/fontconfig/default.nix

@@ -36,6 +36,8 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  outputs = [ "dev" "lib" "bin" "out" ]; # $out contains all the config
+
   propagatedBuildInputs = [ freetype ];
   buildInputs = [ pkgconfig expat ];