Changes

OBS: build_srcpkg.Dockerfile: add dh-runit

Add dh-runit, so we can build source packages of newer versions of
pcsc-lite.

Related: https://salsa.debian.org/debian/pcsc-lite/-/commit/c7c40df72dc3c754341501e34aa096fd72a61cef
Change-Id: I8d852cebb9decb3c881fd3ff9b530213bade0216

jobs/master-builds.yml: add missing job type 'distcheck'

We do have this job type in gerrit-verifications.yml, so it's executed
for each patch submitted to Gerrit.  However, we are not executing
'distcheck' during the daily master builds - fix this.

Change-Id: I4898ba712a29a6afc34bc22adec6a3131ce8c794
Fixes: 31fd5cf0 ("gerrit-verifications: execute 'distcheck' job for pysim")