Cmd.py: build script for native development

cmd.py is a wrapper over gradle build commands.

Everyone’s got their own flow, but I find myself writing wrappers like these when I start native VR projects. It lets me specify sequences of commands, e.g.
./cmd.py profile build
./cmd.py profile build install start
./cmd.py debug uninstall build install start
./cmd.py release stop start

Oh, this is cool. Thanks for sharing!