Build quota plugin against 3.{9,10,11}

Change-Id: Iba4f7e6e66a83dcc4fd1a903c650efd156125536
diff --git a/jenkins/gerrit-bazel-plugin-quota.yaml b/jenkins/gerrit-bazel-plugin-quota.yaml
index 54f5887..7458cf2 100644
--- a/jenkins/gerrit-bazel-plugin-quota.yaml
+++ b/jenkins/gerrit-bazel-plugin-quota.yaml
@@ -6,3 +6,6 @@
             - master
           gerrit-branch:
             - master
+            - gerrit-3.9
+            - gerrit-3.10
+            - gerrit-3.11