Build/Compile with SDL support

Description:

So, the current mpv package does not compiled/built with sdl support. That means we cannot use some of the feature such as controller/gamepad/joystick input, sdl audio output (for compat), and sdl video output (for compat).

With the cotroller/gamepad/joystick input, the user will now be able to bind controller input to any action on the mpv. Although by default, mpv will not bind any of the controller input. If this considered kinda niche, maybe another option is, similar to Kodi, to separate the package for controller/gamepad/joystick support.

Thanks.