Cross-build automerger for Gerrit 2.14

Change-Id: I1b471f3e910c923512e40bddffe0c7a103ac7011
diff --git a/jenkins/gerrit-buck-bazel-plugin-automerger.yaml b/jenkins/gerrit-buck-bazel-plugin-automerger.yaml
index 2106816..b21a35e 100644
--- a/jenkins/gerrit-buck-bazel-plugin-automerger.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-automerger.yaml
@@ -1,6 +1,9 @@
 - project:
     name: automerger
     jobs:
-      - 'plugin-{name}-bazel-{branch}':
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch:
             - master
+          gerrit-branch:
+            - master
+            - stable-2.14