Relicense to Apache-2.0 with the LLVM-exception (#137)

With agreement from contributors.

core/shared-lib/utils/shared_utils.cmake

@@ -1,16 +1,5 @@
 # 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.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (UTILS_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})