treewide: mark packages broken on darwin

pkgs/games/hheretic/default.nix

···
     mainProgram = "hheretic-gl";
     maintainers = with lib.maintainers; [ moody ];
     inherit (SDL.meta) platforms;
+    broken = stdenv.isDarwin;
   };
 })

pkgs/games/hhexen/default.nix

···
     maintainers = with lib.maintainers; [ moody djanatyn ];
     mainProgram = "hhexen-gl";
     inherit (SDL.meta) platforms;
+    broken = stdenv.isDarwin;
   };
 })

pkgs/games/lgames/barrage/default.nix

···
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ AndersonTorres ];
     inherit (SDL.meta) platforms;
+    broken = stdenv.isDarwin;
   };
 }

pkgs/games/lgames/ltris/default.nix

···
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ AndersonTorres ciil ];
     inherit (SDL.meta) platforms;
+    broken = stdenv.isDarwin;
   };
 }

pkgs/games/powermanga/default.nix

···
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
+    broken = stdenv.isDarwin;
   };
 }

pkgs/games/tecnoballz/default.nix

···
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
+    broken = stdenv.isDarwin;
   };
 }