Small patch to reverse hardlink ordering

Small patch to reverse hardlink ordering

Hi Panu et al,

Here's a small patch that changes the ordering used for putting
hardlinked files into the cpio archive back to lexicographical.

You might wonder what this is about. Well, old rpm-3 (and
also old versions of rpm-4, I think) already used lexicographical
ordering for files and hardlinks. When deltarpm was created,
it made use of this fact when "compressing" the file order
of the cpio archive into the so-called "sequence". Deltarpm
can deal with "out of order" files, but in that case it needs
to reset the compression, which leads to really long sequence
strings.

Signed-off-by: Panu Matilainen <pmatilai@redhat.com>