Now that #12009 is merged, we should let the system find the binary on
the users $PATH and don't assume we know where to look for them in
different distributions.
- The export process now builds complete .ipa on macOS, instead of just
creating XCode project.
- The project includes Capabilities games usually require: Game Center,
Push Notifications, In-App Purchase.
- Icons and launch screens can be specified in export preset.
