cups-filters: Update to 1.28.9

cups-filters: Update to 1.28.9

- Update from 1.28.8 to 1.28.9
- Update of rootfile not required
- Changelog
     CHANGES IN V1.28.9
	- libcupsfilters: Silenced compiler warnings
	- libcupsfilters: Removed duplicate code in the
	  apply_filters() function.
	- driverless: If there are no driverless IPP printers
	  available let "driverless" terminate with exit code 0 and
	  not 1, to follow CUPS' standard of backends in discovery
	  mode terminating with 0 if there are no appropriate printers
	  found (Issue #375).
	- gstoraster, foomatic-rip: Fixed Ghostscript command line for
	  counting pages as it took too long on PDFs from evince when
	  printing DjVu files (Issue #354, Pull request #371, Ubuntu
	  bug #1920730).
	- cups-browsed: Renamed ldap_connect() due to conflict in
	  new openldap (Issue #367, Pull request #370).
	- pdftoraster: Free color data after processing of each page
	  (Pull request #363).
	- cups-browsed: Always save "...-default" option entries
	  from printers.conf, regardless of presence or absense
	  of PPD file (Pull request #359).
	- cups-browsed: Start after network-online.target (Pull
	  request #360).
	- texttopdf: Set default margins when no PPD file is used
	  (Pull request #356).

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>