Update to latest Rust (https://github.com/rust-lang/rust/pull/15709)
Update to latest Rust (https://github.com/rust-lang/rust/pull/15709)

sectopod/gfx-rs,tempbottle/gfx,aepsil0n/gfx-rs,alexcrichton/gfx,JohnColanduoni/gfx,davll/gfx,ColinKinloch/gfx,mitchmindtree/gfx-rs,gfx-rs/gfx-rs,Bastacyclop/gfx,tanderegg/gfx,red75prime/gfx,tanderegg/gfx,bvssvni/gfx-rs,ColinKinloch/gfx,JohnColanduoni/gfx