liblo: We need to provide LibreOffice with fake command line args too.

Change-Id: I34f364e63f814921bfe88af7cdf4ff4cdf6745fa
Reviewed-on: https://gerrit.libreoffice.org/8894
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>