Following the license change, modify the boilerplates in test/

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7767)
diff --git a/test/cipherbytes_test.c b/test/cipherbytes_test.c
index 6418b42..370d033 100644
--- a/test/cipherbytes_test.c
+++ b/test/cipherbytes_test.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
  *
- * Licensed under the OpenSSL licenses, (the "License");
+ * Licensed under the Apache License 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  * https://www.openssl.org/source/license.html