Build git-refs-filter master against Gerrit stable-3.{7,8,9}

Change-Id: I74f5e7b74c42d30974635459f571fa62b76e523c
diff --git a/jenkins/gerrit-bazel-module-git-refs-filter.yaml b/jenkins/gerrit-bazel-module-git-refs-filter.yaml
index c7db878..44285ed 100644
--- a/jenkins/gerrit-bazel-module-git-refs-filter.yaml
+++ b/jenkins/gerrit-bazel-module-git-refs-filter.yaml
@@ -5,5 +5,10 @@
           branch:
             - master
           gerrit-branch:
-            - master
+            - stable-3.9
+            - stable-3.8
+            - stable-3.7
             - stable-3.6
+      - 'module-{name}-bazel-{branch}':
+          branch:
+            - master
\ No newline at end of file