Fixes deprecated warning from latest nightly
Fixes deprecated warning from latest nightly

Fixes:
```
../gl_device/info.rs:278:25: 278:42 warning: use of deprecated item: use
contains and BorrowFrom, #[warn(deprecated)] on by default
../gl_device/info.rs:278         self.extensions.contains_equiv(s)
```

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