Build 'cached-refdb' master against Gerrit 'stable-3.[6|7]' branches

Change-Id: Ife025fe2f3178ced3c0e62c6790f85d2deb7c802
diff --git a/jenkins/gerrit-bazel-module-cached-refdb.yaml b/jenkins/gerrit-bazel-module-cached-refdb.yaml
index 1d81061..dbea86e 100644
--- a/jenkins/gerrit-bazel-module-cached-refdb.yaml
+++ b/jenkins/gerrit-bazel-module-cached-refdb.yaml
@@ -10,4 +10,10 @@
             - stable-3.3
           gerrit-branch:
             - stable-3.4
+      - 'module-{name}-bazel-{branch}-{gerrit-branch}':
+          branch:
+            - master
+          gerrit-branch:
+            - stable-3.7
+            - stable-3.6
       - 'module-{name}-verifier'