Add toolchain for WAMR (#127)

* add toolchain for wamr

* add copyright

core/iwasm/app-samples/hello-world-cmake/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Copyright (C) 2019 Intel Corporation.  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.
+
+mkdir build
+cd build
+cmake .. -DCMAKE_TOOLCHAIN_FILE=../../../../test-tools/toolchain/wamr_toolchain.cmake
+make