Cross-build reviewers-by-blame for Gerrit 2.14

Change-Id: I060927804710bf841ec217775d68c4526c5bffc4
diff --git a/jenkins/gerrit-buck-bazel-plugin-reviewers-by-blame.yaml b/jenkins/gerrit-buck-bazel-plugin-reviewers-by-blame.yaml
index ebfc840..82dec65 100644
--- a/jenkins/gerrit-buck-bazel-plugin-reviewers-by-blame.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-reviewers-by-blame.yaml
@@ -7,6 +7,9 @@
             - stable-2.12
             - stable-2.11
             - stable-2.10
-      - 'plugin-{name}-bazel-{branch}':
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch:
             - master
+          gerrit-branch:
+            - master
+            - stable-2.14