Build motd plugin for Gerrit v3.[0-2]

Change-Id: Ic2d84101d92d7b013f11f2503bc82e9cb6249f2f
diff --git a/jenkins/gerrit-bazel-plugin-motd.yaml b/jenkins/gerrit-bazel-plugin-motd.yaml
index 2dd627c..c0f2805 100644
--- a/jenkins/gerrit-bazel-plugin-motd.yaml
+++ b/jenkins/gerrit-bazel-plugin-motd.yaml
@@ -1,6 +1,14 @@
 - project:
     name: motd
     jobs:
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
+          branch:
+            - master
+          gerrit-branch:
+            - master
+            - stable-3.2
+            - stable-3.1
+            - stable-3.0
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master