[NaCl SDK] Consistent use of copyright header.

native_client_sdk/src/libraries/nacl_io_test/kernel_wrap_test.cc

-/* Copyright (c) 2013 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 #include <string>
 #include <vector>
 #include "gtest/gtest.h"
 #include "nacl_io/kernel_proxy.h"
 #include "nacl_io/kernel_intercept.h"
 #include "nacl_io/kernel_wrap.h"
 #include "kernel_proxy_mock.h"
 
 using namespace nacl_io;
@@ skipping 263 matching lines @@
   const struct utimbuf* times;
   EXPECT_CALL(mock, utime(StrEq("utime"), times));
   utime("utime", times);
 }
 
 TEST_F(KernelWrapTest, write) {
   EXPECT_CALL(mock, write(6789, NULL, 7891)).Times(1);
   write(6789, NULL, 7891);
 }