Add build script, this will be used in CI.

Signed-off-by: Lantao Liu <lantaol@google.com>

test/windows/build.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Copyright The containerd Authors.
+#
+# 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.
+
+# This script is used to build and upload containerd with latest CRI plugin
+# from containerd/cri in gcr.io/k8s-testimages/kubekins-e2e.
+
+set -o xtrace
+set -o errexit
+set -o nounset
+set -o pipefail
+
+source $(dirname "${BASH_SOURCE[0]}")/../build-utils.sh
+cd "${ROOT}"
+
+# Make sure output directory is clean.
+GOOS=windows make clean
+# Build and push test tarball.
+PUSH_VERSION=true DEPLOY_DIR=${DEPLOY_DIR:-"windows"} GOOS=windows \
+  make push TARBALL_PREFIX=cri-containerd-cni INCLUDE_CNI=true CUSTOM_CONTAINERD=true