...when e.g. doing 'make sal.clean'

Change-Id: I63c13dd010cf8d24f9548cf2fe089067381a4efe
Reviewed-on: https://gerrit.libreoffice.org/43948Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>