Make copyright headers consistent with Google template; remove "(C)"

Test: Comment changes only; still compiles...
Change-Id: Id699a8170112f06e4a2c9f2e0f0834d1817ace4e
diff --git a/stack/gatt/gatt_sr.cc b/stack/gatt/gatt_sr.cc
index 90ae8a4..f955fbf 100644
--- a/stack/gatt/gatt_sr.cc
+++ b/stack/gatt/gatt_sr.cc
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- *  Copyright (C) 2008-2012 Broadcom Corporation
+ *  Copyright 2008-2012 Broadcom Corporation
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.