sdl/gamecontroller: define SDL_SensorType enum to fix build on older SDL2 such as version 2.0.8
sdl/gamecontroller: define SDL_SensorType enum to fix build on older SDL2 such as version 2.0.8

Signed-off-by: Lilis Iskandar <f9acb790f2c75b127492316321ece0121b8eed9b@veand.co>

veandco/go-sdl2,veandco/go-sdl2