Fixed build.rs with static & pkgconfig
Fixed build.rs with static & pkgconfig

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