build: Add explicit targets for multiple platforms
build: Add explicit targets for multiple platforms

The upcoming release will publish binaries for windows, mac and linux.
This patch makes sure build targets are implemented for all three.

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