libmemtrack: Revert back the AOSP copyright years to 2013

AOSP copyright years are incorrectly updated to 2013, 2016.
Revert back AOSP copyright years to 2013 to as per requirement.

Change-Id: I2235f415ce7c40d03f3060d4ac2bbb8690cce6d0
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
diff --git a/libmemtrack/kgsl.c b/libmemtrack/kgsl.c
index 3bd80c7..ac47be3 100644
--- a/libmemtrack/kgsl.c
+++ b/libmemtrack/kgsl.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013, 2016 The Android Open Source Project
+ * Copyright (C) 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.