Relicense SPIRV-Tools under Apache 2.0

Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/383

Finalize v2016.4
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 2215715..5b71d43 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,28 +1,16 @@
 # Copyright (c) 2015-2016 The Khronos Group Inc.
 #
-# Permission is hereby granted, free of charge, to any person obtaining a
-# copy of this software and/or associated documentation files (the
-# "Materials"), to deal in the Materials without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Materials, and to
-# permit persons to whom the Materials are furnished to do so, subject to
-# the following conditions:
+# 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
 #
-# The above copyright notice and this permission notice shall be included
-# in all copies or substantial portions of the Materials.
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
-# MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
-# KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
-# SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
-#    https://www.khronos.org/registry/
-#
-# THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-# MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+# 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.
 
 # Add a SPIR-V Tools unit test. Signature:
 #   add_spvtools_unittest(