device: gl: tex: clean up some absolute references with imports
device: gl: tex: clean up some absolute references with imports

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