mark CVE-2019-7443 no-dsa in jessie

This patch removes support for passing gui variants to kauth helpers
but this "feature" was not used by any part of the official KDE source
code.

This basically means that this patch only impacts hypothetical 3rd
party helpers which we cannot test.

As far as I investigated the source code, applying the kauth patch to
kde4libs should not be a problem, but there are still some regression
risks and given the low impact I'd rather mark it no-dsa.