reproducible: don't try to build a disorderfs debian source package

Signed-off-by: Holger Levsen <holger@layer-acht.org>

job-cfg/reproducible.yaml

@@ -871,7 +871,7 @@
                     my_timed: '42 23 1 1 *'
                     my_gitrepo: 'https://salsa.debian.org/reproducible-builds/disorderfs.git'
                     my_gitbranches: 'origin/debian'
-                    my_shell: '/srv/jenkins/bin/chroot-run.sh sid --exports-results debuild -e JENKINS_EXPORTS_DIR -uc -us'
+                    my_shell: '/srv/jenkins/bin/chroot-run.sh sid --exports-results debuild -e JENKINS_EXPORTS_DIR -uc -us -b'
                     my_parse_rules: '/srv/jenkins/logparse/debian-pkg-ci.rules'
                 - 'builds_website':
                     my_description: 'Build https://reproducible-builds.org on every git commit to {my_gitrepo} with jekyll.'