Add build-containerd.sh to build containerd from existing repo

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

hack/install/install-runc.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Copyright 2018 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.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+source $(dirname "${BASH_SOURCE[0]}")/utils.sh
+RUNC_DIR=${DESTDIR}
+RUNC_PKG=github.com/opencontainers/runc
+
+# Create a temporary GOPATH for runc installation.
+TMPGOPATH=$(mktemp -d /tmp/cri-install-runc.XXXX)
+GOPATH=${TMPGOPATH}
+
+# Install runc
+from-vendor RUNC github.com/opencontainers/runc
+checkout_repo ${RUNC_PKG} ${RUNC_VERSION} ${RUNC_REPO}
+cd ${GOPATH}/src/${RUNC_PKG}
+make static BUILDTAGS="$BUILDTAGS"
+${SUDO} make install -e DESTDIR=${RUNC_DIR}
+
+# Clean the tmp GOPATH dir. Use sudo because runc build generates
+# some privileged files.
+${SUDO} rm -rf ${TMPGOPATH}