Send a link to Downstream_projects on Gerrit

This way the user can directly get a link to the useful results
of a global presubmit.

Change-Id: I40dc5ae8d19e5326117ac91a6c85659f5e150a3c
diff --git a/jenkins/jobs/CR-global.xml.tpl b/jenkins/jobs/CR-global.xml.tpl
index d68eea9..6d05ea3 100644
--- a/jenkins/jobs/CR-global.xml.tpl
+++ b/jenkins/jobs/CR-global.xml.tpl
@@ -48,6 +48,8 @@
     params.CHANGE_NUMBER,
     params.BRANCH) {
   {{ imports['//jenkins/jobs:global.groovy'] }}
+  delegate.gerrit.comment(params.CHANGE_NUMBER, params.BRANCH,
+                                          "Review result of the global test at ${currentBuild.getAbsoluteUrl()}/Downstream_projects/")
 }</script>
     <sandbox>true</sandbox>
   </definition>
diff --git a/jenkins/lib/vars/gerritReview.groovy b/jenkins/lib/vars/gerritReview.groovy
index 9da4b84..ff2142a 100644
--- a/jenkins/lib/vars/gerritReview.groovy
+++ b/jenkins/lib/vars/gerritReview.groovy
@@ -28,9 +28,9 @@
     echo "Reviewing change ${url} (${branch})"
     gerrit.addReviewer(changeNum)
     gerrit.comment(changeNum, branch,
-		   "Starting build at ${JenkinsUtils.getBlueOceanUrl(currentBuild)}")
+                   "Starting build at ${JenkinsUtils.getBlueOceanUrl(currentBuild)}")
   }
-  def config = [gerritBuild: currentBuild]
+  def config = [gerritBuild: currentBuild, gerrit: gerrit]
   def result = null
   try {
     body.delegate = config