hal: fix incorrectly updated copyrights for source files

Fix incorrectly updated copyrights for source files.

Change-Id: If321f8fb0489f3088e867d4f200c6d1581ed9f57
diff --git a/hal/voice.c b/hal/voice.c
index 74d1978..6aff1f1 100644
--- a/hal/voice.c
+++ b/hal/voice.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
  * Not a contribution.
  *
- * Copyright (C) 2013-2014 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.