Add a patch so that autohell correctly detects struct diskstats

dc_rbytes member, fixing the build.

sysutils/libstatgrab/Makefile

@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.2 2010/01/18 22:03:46 okan Exp $
+# $OpenBSD: Makefile,v 1.3 2010/09/13 08:54:21 landry Exp $
 
 COMMENT=	system statistics gathering library
 
 DISTNAME=	libstatgrab-0.15
-PKGNAME=	${DISTNAME}p0
+REVISION=	1
 CATEGORIES=	sysutils
 
 HOMEPAGE=	http://www.i-scream.org/libstatgrab/

sysutils/libstatgrab/patches/patch-configure

@@ -0,0 +1,11 @@
+$OpenBSD: patch-configure,v 1.1 2010/09/13 08:54:21 landry Exp $
+--- configure.orig	Fri Jul 13 22:44:37 2007
++++ configure	Mon Sep 13 10:37:37 2010
+@@ -20205,6 +20205,7 @@ _ACEOF
+ cat confdefs.h >>conftest.$ac_ext
+ cat >>conftest.$ac_ext <<_ACEOF
+ /* end confdefs.h.  */
++#include <sys/types.h>
+ #include <sys/disk.h>
+ 
+ int