IVGCVSW-1807: change license text in file headers

All changes are the same:

  //
  // Copyright © 2017 ARM Ltd. All rights reserved.
 -// See LICENSE file in the project root for full license information.
 +// SPDX-License-Identifier: MIT
  //

Change-Id: Ibb7ed1e4e2191b9a978e26b5bacf916db403a60e
diff --git a/test/Android.mk b/test/Android.mk
index f96577c..cab874c 100644
--- a/test/Android.mk
+++ b/test/Android.mk
@@ -1,6 +1,6 @@
 #
 # Copyright © 2017 ARM Ltd. All rights reserved.
-# See LICENSE file in the project root for full license information.
+# SPDX-License-Identifier: MIT
 #
 
 LOCAL_PATH := $(call my-dir)