roken: getopt should include roken.h

In order to correctly rename the function, getopt.c needs to include
roken.h

lib/roken/getopt.c

@@ -34,6 +34,9 @@ static char sccsid[] = "@(#)getopt.c	8.1 (Berkeley) 6/4/93";
 #ifndef __STDC__
 #define const
 #endif
+#include <config.h>
+#include "roken.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>