Build out-of-the-box plugin on stable-3.3

Change-Id: I9ce13e625a0aaafc47818dae6b4028955dc1cca6
diff --git a/jenkins/gerrit-bazel-plugin-out-of-the-box.yaml b/jenkins/gerrit-bazel-plugin-out-of-the-box.yaml
index 0bb7afc..d4ebebd 100644
--- a/jenkins/gerrit-bazel-plugin-out-of-the-box.yaml
+++ b/jenkins/gerrit-bazel-plugin-out-of-the-box.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.3
             - stable-3.2
             - stable-3.1
             - stable-3.0