Update `sdl_bindings.rs` to SDL 2.0.9
Update `sdl_bindings.rs` to SDL 2.0.9

Cobrand/rust-sdl2,Rust-SDL2/rust-sdl2,AngryLawyer/rust-sdl2,Cobrand/rust-sdl2,Rust-SDL2/rust-sdl2,Cobrand/rust-sdl2,Rust-SDL2/rust-sdl2