More -fno-builtin failures.

games/adventure/done.c

@@ -47,6 +47,7 @@ static const char rcsid[] =
 /*      Re-coding of advent in C: termination routines                  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "hdr.h"
 
 int

games/adventure/main.c

@@ -57,6 +57,7 @@ static const char rcsid[] =
 #include <sys/types.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include "hdr.h"

games/adventure/subr.c

@@ -47,6 +47,7 @@ static const char rcsid[] =
 /*      Re-coding of advent in C: subroutines from main                 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "hdr.h"