t.bogodir on powerpc

[Clint Adams]

> Actually we already know that $HOME is set.  In t.bogodir variable expect 
> is "$HOME/.bogofilter" and is printed out in "echo ### expect: 
> $expect/goodlist.db".  We see the "### expect" message, which is how path 
> "/home/buildd/.bogofilter" got into the output.

On powerpc
drwxr-sr-x    3 root     root         4096 Feb 17 12:37 /home/buildd

That explains the inability to mkdir.