games/ghrino: Fix on modern gcc

Patches taken from dports, which were taken from pkgsrc.
The port is not maintained.

games/grhino/files/patch-fix-headers

@@ -0,0 +1,56 @@
+$NetBSD: patch-aiai.cc,v 1.1 2011/11/24 14:08:05 joerg Exp $
+$NetBSD: patch-game.cc,v 1.1 2011/11/24 14:08:05 joerg Exp $
+$NetBSD: patch-gen__book.cc,v 1.1 2011/11/24 14:08:05 joerg Exp $
+$NetBSD: patch-gen__pattern.cc,v 1.1 2011/11/24 14:08:05 joerg Exp $
+$NetBSD: patch-log__proc.h,v 1.1 2011/11/24 14:08:05 joerg Exp $
+
+--- aiai.cc.orig	2011-11-24 01:17:40.000000000 +0000
++++ aiai.cc
+@@ -29,6 +29,7 @@
+ #include <sys/wait.h>
+ #include <unistd.h>
+ #include <string.h>
++#include <stdlib.h>
+ 
+ #include <exception>
+ #include <stdexcept>
+--- game.cc.orig	2011-11-24 01:12:02.000000000 +0000
++++ game.cc
+@@ -37,6 +37,7 @@
+ #include <sys/stat.h> 
+ #include <unistd.h>
+ #include <fcntl.h>
++#include <stdlib.h>
+ 
+ #ifdef _
+ #  undef _
+--- gen_book.cc.orig	2011-11-24 01:15:36.000000000 +0000
++++ gen_book.cc
+@@ -20,6 +20,7 @@
+ 
+ #include "config.h"
+ 
++#include <cstring>
+ #include <fstream>
+ #include <sstream>
+ 
+--- gen_pattern.cc.orig	2011-11-24 01:16:59.000000000 +0000
++++ gen_pattern.cc
+@@ -23,6 +23,7 @@
+ #include <fstream>
+ #include <sstream>
+ 
++#include <string.h>
+ #include <math.h>
+ #include <unistd.h>
+ #include <fcntl.h>
+--- log_proc.h.orig	2011-11-24 01:12:41.000000000 +0000
++++ log_proc.h
+@@ -25,6 +25,7 @@
+ #include <string>
+ #include <fstream>
+ #include <iomanip>
++#include <cstdlib>
+ 
+ #include "board.h"
+ #include "order.h"