Code review comment for lp:~rockstar/tarmac/die-makefile-die

The clean command needs to derive from the one provided by distutils and chain up to it. For a simple example, the ubuntuone-storage-protocol clean command does this:

http://bazaar.launchpad.net/~ubuntuone-control-tower/ubuntuone-storage-protocol/trunk/view/head:/setup.py#L57