Add trigger Jenkins job tool. (#1264)

* Add trigger Jenkins job tool.

You can trigger downstream Jenkins jobs from Drone CI server or command line.

* Fix alphabetical

README.md

@@ -1301,6 +1301,7 @@ Software written in Go.
 * [Banshee](https://github.com/eleme/banshee) - Anomalies detection system for periodic metrics.
 * [bosun](https://github.com/bosun-monitor/bosun) - Time Series Alerting Framework.
 * [dogo](https://github.com/liudng/dogo) - Monitoring changes in the source file and automatically compile and run (restart).
+* [drone-jenkins](https://github.com/appleboy/drone-jenkins) - Trigger downstream Jenkins jobs using a binary, docker or Drone CI.
 * [drone-scp](https://github.com/appleboy/drone-scp) - Copy files and artifacts via SSH using a binary, docker or Drone CI.
 * [Dropship](https://github.com/chrismckenzie/dropship) - A tool for deploying code via cdn.
 * [EasySSH](https://github.com/hypersleep/easyssh) - Golang package for easy remote execution through SSH and SCP downloading.