Temporarily make -cdboot files 0700 again.
    
    We need to move these to /boot/efi/EFI/BOOT/ and change the perms at the same
    time, but that means changing this, comps, and lorax (at least) at the same
    time.  Right this minute isn't a good time to do that.
    
    Signed-off-by: Peter Jones <pjones@redhat.com>