Removing pkg directory, since it is no longer necessary. From now on, we'll just...

Removing pkg directory, since it is no longer necessary.  From now on, we'll just pull the tarballs from DISTDIR directly, and we've already moved our caches to /var/tmp/genkernel, so there's nothing left to keep here.  This is genkernel 3.4.10_pre7 for testing.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@656 67a159dc-881f-0410-a524-ba9dfbe2cb84