Update glutin example.
Update glutin example.

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