Add push-devel-build.sh to upload release artifacts to current GCS project

This is essentially a variant of push-ci-build.sh, but pushes it to
the current project. The defaults for gcs::release actually pick a
shorthash of the GCS project, so you end up uploading to something
like: gs://kubernetes-releases-3fda2/devel/v0.8.0-437-g7f147ed/ (where
the last part is the "git describe" of your current commit)

build/push-devel-build.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# Copyright 2015 Google Inc. 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.
+
+# Pushes a development build to a directory in your current project,
+# pushing to something like:
+# gs://kubernetes-releases-3fda2/devel/v0.8.0-437-g7f147ed/
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+LATEST=$(git describe)
+KUBE_GCS_NO_CACHING=n
+KUBE_GCS_MAKE_PUBLIC=y
+KUBE_GCS_UPLOAD_RELEASE=y
+KUBE_GCS_RELEASE_PREFIX="devel/${LATEST}"
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+source "$KUBE_ROOT/build/common.sh"
+
+kube::release::gcs::release