Fix static linking not working with sdl 2.0.8
Fix static linking not working with sdl 2.0.8

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