Build egit against gerrit 3.3

Change-Id: I33b547a33bee27406efae926627af2554f1a50e6
diff --git a/jenkins/gerrit-bazel-plugin-egit.yaml b/jenkins/gerrit-bazel-plugin-egit.yaml
index 2fc1672..ae36fad 100644
--- a/jenkins/gerrit-bazel-plugin-egit.yaml
+++ b/jenkins/gerrit-bazel-plugin-egit.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.3
             - stable-3.2
             - stable-3.1
             - stable-2.16