Ensure all incude statements are kept together by moving the

sys/cdefs.h include appropriately.

MFC after:	1 week
X-MFC with:	r325030

lib/libc/stdio/gets.c

@@ -33,9 +33,9 @@
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)gets.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/cdefs.h>
 #include "namespace.h"
 #include <unistd.h>
 #include <stdio.h>