KDE4 is out of maintenance upstream since Nov. 2014, and binaries
provided by TDF have switched to KDE5 as the official backend.

Change-Id: I165465b56d3ba3a18912b203c06ae8fc6111c0c9
Reviewed-on: https://gerrit.libreoffice.org/60014Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>