Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/cluster/images/etcd/README.md

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+### etcd
+
+This is a small etcd image used in Kubernetes setups where `etcd` is deployed as a docker image.
+
+For `amd64`, official `etcd` and `etcdctl` binaries are downloaded from Github to maintain official support.
+For other architectures, `etcd` is cross-compiled from source. Arch-specific `busybox` images serve as base images.
+
+#### How to release
+
+```console
+# Build for linux/amd64 (default)
+$ make push ARCH=amd64
+# ---> gcr.io/google_containers/etcd-amd64:TAG
+# ---> gcr.io/google_containers/etcd:TAG
+
+$ make push ARCH=arm
+# ---> gcr.io/google_containers/etcd-arm:TAG
+
+$ make push ARCH=arm64
+# ---> gcr.io/google_containers/etcd-arm64:TAG
+
+$ make push ARCH=ppc64le
+# ---> gcr.io/google_containers/etcd-ppc64le:TAG
+```
+
+If you don't want to push the images, run `make` or `make build` instead
+
+
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/cluster/images/etcd/README.md?pixel)]()