Bug#808057: Please demote dependency on liblouisutdm1-bin

[Yuri D'Elia <wavexx@thregr.org>]

Package: cups-filters
Version: 1.7.0-1
Followup-For: Bug #808057

Hi, I've seen this discussed for 1.4.*, but cups-filters is now at 1.7 and
liblouis-data/liblouisutdml-bin are still hard dependencies.