Enable lintian checks

They should pass now

.gitlab-ci.yml

@@ -47,7 +47,7 @@ deploy:stretch:
     - ln -s *.tar.* $(echo *.tar.* | sed 's/\(.*\)-\(.*\).\(tar.*\)/\1_\2.orig.\3/')
     - cd $(find . -type d -maxdepth 1 -name 'lscsoft-glue-*')
     - dpkg-buildpackage -us -uc
-    - lintian ../*.{deb,changes} || true  # FIXME: lintian does not yet pass
+    - lintian ../*.{deb,changes}
   artifacts:
     paths:
       - '*.deb'