Include marker file for release notes

This is so that we can create a list of directories to ignore when we
rsync documentation builds to a publishing site. Some builds are
published as subdirectories underneath the results of superior builds.
This allows those superior builds to be rsynced without removing the
other builds that were published under them.

Change-Id: Ie2eb32c4853188fa059018dffb0e161fcf95c085

jenkins/jobs/openstack-publish-jobs.yaml

@@ -74,6 +74,11 @@
           git checkout origin/master
       - tox:
           envlist: 'releasenotes'
+      - shell: |
+          #!/bin/bash -xe
+          MARKER_TEXT="Project: $ZUUL_PROJECT Ref: $ZUUL_REFNAME Build: $ZUUL_UUID"
+          echo $MARKER_TEXT > releasenotes/build/html/.root-marker
+
 
     publishers:
       - ftp: