Add gerrit plugin automerger to ci

Change-Id: I437021667ea44fbb6bea2190ce4bd456482b377d
diff --git a/jenkins/gerrit-buck-bazel-plugin-automerger.yaml b/jenkins/gerrit-buck-bazel-plugin-automerger.yaml
new file mode 100644
index 0000000..2106816
--- /dev/null
+++ b/jenkins/gerrit-buck-bazel-plugin-automerger.yaml
@@ -0,0 +1,6 @@
+- project:
+    name: automerger
+    jobs:
+      - 'plugin-{name}-bazel-{branch}':
+          branch:
+            - master