Build simple-submit-rules on stable-3.3

Change-Id: I4927aebda68feb9ab9a0f074cb9fd09508b4330e
diff --git a/jenkins/gerrit-bazel-plugin-simple-submit-rules.yaml b/jenkins/gerrit-bazel-plugin-simple-submit-rules.yaml
index f879c9d..7067be2 100644
--- a/jenkins/gerrit-bazel-plugin-simple-submit-rules.yaml
+++ b/jenkins/gerrit-bazel-plugin-simple-submit-rules.yaml
@@ -3,6 +3,7 @@
     jobs:
       - 'plugin-{name}-bazel-{branch}':
           branch:
+            - stable-3.3
             - stable-3.2
             - stable-2.16
       - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
@@ -11,4 +12,3 @@
           gerrit-branch:
             - master
             - stable-3.4
-            - stable-3.3