make: Rename golang-check to gocheck
make: Rename golang-check to gocheck

Developers need to type it all the time, so it should be short.

kelda/kelda,quilt/quilt,LuiseV/quilt,kklin/quilt,quilt/quilt,NetSys/quilt,kklin/kelda,kklin/quilt,kklin/quilt,kayousterhout/quilt,kklin/quilt,kayousterhout/quilt,kayousterhout/quilt,ejj/quilt-dev,quilt/quilt,NetSys/quilt,ejj/quilt-dev,kayousterhout/quilt,kklin/kelda,kelda/kelda,kelda/kelda,quilt/quilt,LuiseV/quilt,LuiseV/quilt,NetSys/quilt,ejj/quilt-dev,NetSys/quilt,ejj/quilt-dev,NetSys/quilt,kklin/kelda,kelda/kelda,LuiseV/quilt,kklin/kelda,LuiseV/quilt