Update Build Status link

Update the build status link to point to jenkins.cilium.io.

Signed-off-by: Michi Mutsuzaki <michi@covalent.io>

README.md

@@ -1,7 +1,7 @@
 ![Cilium Logo](https://cdn.rawgit.com/cilium/cilium/master/doc/images/cilium.svg)
 # BPF & XDP for containers
 
-[![Build Status](https://travis-ci.org/cilium/cilium.svg?branch=master)](https://travis-ci.org/cilium/cilium)
+[![Build Status](https://jenkins.cilium.io/job/cilium/job/cilium/job/master/badge/icon)](https://jenkins.cilium.io/job/cilium/job/cilium/job/master/)
 [![Go Report Card](https://goreportcard.com/badge/github.com/cilium/cilium)](https://goreportcard.com/report/github.com/cilium/cilium)
 [![Apache licensed](https://img.shields.io/badge/license-Apache-blue.svg)](https://github.com/cilium/cilium/blob/master/LICENSE)
 [![GPL licensed](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/cilium/cilium/blob/master/bpf/COPYING)