README: add build badge for etcd-operator-master-k8s-master
# etcd operator
-
+Kubernetes stable :
[![Build Status](https://jenkins-etcd-public.prod.coreos.systems/buildStatus/icon?job=etcd-operator-master)](https://jenkins-etcd-public.prod.coreos.systems/job/etcd-operator-master/)
+Kubernetes master :
+[![Build Status](https://jenkins-etcd-public.prod.coreos.systems/buildStatus/icon?job=etcd-operator-master-k8s-master)](https://jenkins-etcd-public.prod.coreos.systems/job/etcd-operator-master-k8s-master/)
+
### Project status: beta
Major planned features have been completed and while no breaking API changes are currently planned, we reserve the right to address bugs and API changes in a backwards incompatible way before the project is declared stable. Any breaking changes introduced will be documented in release notes.
