Build GitHub plugin for Gerrit v2.16/v3.0

Change-Id: I6b33a8c86264547bd81a8a51540fc9562cf1a1a7
diff --git a/jenkins/gerrit-mvn-plugin-github.yaml b/jenkins/gerrit-mvn-plugin-github.yaml
index f9ac29b..1c3418c 100644
--- a/jenkins/gerrit-mvn-plugin-github.yaml
+++ b/jenkins/gerrit-mvn-plugin-github.yaml
@@ -3,6 +3,8 @@
     repo: github
     branch:
       - master
+      - stable-3.0
+      - stable-2.16
       - stable-2.15
       - stable-2.14
       - stable-2.13