Add GCC to path.
Add GCC to path.

Fixes #932 (maybe)
ColinKinloch/gfx,Bastacyclop/gfx,davll/gfx,gfx-rs/gfx-rs,tanderegg/gfx,JohnColanduoni/gfx,tanderegg/gfx,ColinKinloch/gfx,sectopod/gfx-rs,JohnColanduoni/gfx