Add gamepad rumble support

[onox]

Binding SDL's SDL_Haptic* functions to support rumble feature of gamepads.

I have a DS4 controller, so I can test it if you don't have any gamepads.

[Lucretia]

I don't know how I didn't see this before.

[Lucretia]

But right now, I do want to get the rendering api stuff done before the SDL game jam.