Remove hardcoded “LibreOffice” name

Change-Id: Iccaafa5a66df3df8bcfc1d2013b38bb15d37fbec
Reviewed-on: https://gerrit.libreoffice.org/12972
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>