Add github-webhooks plugin BUCK build

Change-Id: I2973e390279a784408d03f343edfa7698a18cb55
diff --git a/jenkins/gerrit-buck-plugin-github-webhooks.yaml b/jenkins/gerrit-buck-plugin-github-webhooks.yaml
new file mode 100644
index 0000000..213ccc4
--- /dev/null
+++ b/jenkins/gerrit-buck-plugin-github-webhooks.yaml
@@ -0,0 +1,7 @@
+- project:
+    name: github-webhooks
+    branch:
+      - master
+    jobs:
+      - 'plugin-{name}-{branch}'
+