mopidy-local: un-mark as broken on darwin

pkgs/applications/audio/mopidy/local.nix

···
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
     homepage = "https://github.com/mopidy/mopidy-local";
     description = "Mopidy extension for playing music from your local music archive";
     license = licenses.asl20;