Update setup.py

fix license notice to align with mbed OS guidelines

Author: jlovejoy

setup.py

@@ -1,7 +1,15 @@
-# Copyright 2014-2015 ARM Limited
-#
-# Licensed under the Apache License, Version 2.0
-# See LICENSE file for details.
+# Copyright (c) 2016 ARM Limited, All Rights Reserved
+# SPDX-License-Identifier: Apache-2.0
+
+# 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.
+
 import os
 from setuptools import setup