Style fixes to Support Kit files

headers/os/support/Beep.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007, Haiku, Inc. All Rights Reserved.
+ * Copyright 2007-2014 Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef _BEEP_H
@@ -17,6 +17,6 @@ status_t beep();
 status_t system_beep(const char* eventName);
 status_t add_system_beep_event(const char* eventName, uint32 flags = 0);
 
-#endif
+#endif	// __cplusplus
 
 #endif	// _BEEP_H