Create the stable-3.3 view for plugins

Create a new tab 'stable-3.3' for containing all the plugins
that have a build for Gerrit v3.3.x.

Having the view allows the plugin-manager on Gerrit to discover
all the plugins that are designed for v3.3.x and have a working
build.

Bug: Issue 13479
Change-Id: I299eb600161633722090971e8002c65c9c254bd7
diff --git a/jenkins/gerrit-bazel-plugin-template.yaml b/jenkins/gerrit-bazel-plugin-template.yaml
index 02760d5..b2f9987 100644
--- a/jenkins/gerrit-bazel-plugin-template.yaml
+++ b/jenkins/gerrit-bazel-plugin-template.yaml
@@ -226,6 +226,7 @@
       - 'Plugins-{branch}'
     branch:
       - master
+      - stable-3.3
       - stable-3.2
       - stable-3.1
       - stable-3.0