[PATCH] mock simple fixes

[Dan Williams]

On Tue, 2005-06-21 at 09:48 -0400, Dan Williams wrote:
> 1) Fixes traceback when the buildroot directory doesn't exist (which
> will be the case when we start specifying buildroots on the mock command
> line)

The other fix to this is to move the self._ensure_dir(self.basedir)
above the clean, but I'm assuming there was some reason that it was
originally _below_ the clean (perhaps a wrong assumption).

Dan