Fixing a problem where we were copying the busybox binary cache into the busybox...

Fixing a problem where we were copying the busybox binary cache into the busybox temporary directory.  I am assuming that this was a result of all of the changes we've been doing, and it simply just got everlooked.  Thanks to Marek Szuba <cyberman@if.pw.edu.pl> for pointing it out in bug #204087.  This is genkernel 3.4.9 FINAL.  Enjoy.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@580 67a159dc-881f-0410-a524-ba9dfbe2cb84