Add a jenkins script to build/publish the ISO.

hack/jenkins/build_iso.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Copyright 2016 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+set -e
+ISO="out/buildroot/output/images/rootfs.iso9660"
+make minikube-iso
+openssl sha256 ${ISO} | awk '{print $2}' > "${ISO}.sha256"
+gsutil cp "${ISO}" "${DEST}"
+gsutil cp "${ISO}.sha256" "${DEST}.sha256"