Add support for ARM (Raspberry PI) for nfs-client

- Reorganized to use Makefile for building
- Added arm container for use in ARM based kubernetes clusters

Signed-off-by: Niklas Wik <niklas.wik@iki.fi>
(cherry picked from commit 166056da73)

docker/x86_64/Dockerfile

@@ -0,0 +1,18 @@
+# Copyright 2017 The Kubernetes 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.
+
+FROM alpine:3.6
+RUN apk update --no-cache && apk add ca-certificates
+COPY nfs-client-provisioner /nfs-client-provisioner
+ENTRYPOINT ["/nfs-client-provisioner"]