sysutils/daemontools: include errno.h for errno

errno must be accessed by a macro from errno.h.

PR:		281782
Approved by:	portmgr (build fix blanket), mikael

sysutils/daemontools/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	daemontools
 PORTVERSION=	0.76
-PORTREVISION=	19
+PORTREVISION=	20
 CATEGORIES=	sysutils
 MASTER_SITES=	http://cr.yp.to/daemontools/ \
 		http://mirror.shatow.net/freebsd/${PORTNAME}/:DEFAULT,1 \

sysutils/daemontools/files/patch-error.h

@@ -0,0 +1,11 @@
+--- error.h.orig
++++ error.h
+@@ -3,7 +3,7 @@
+ #ifndef ERROR_H
+ #define ERROR_H
+ 
+-extern int errno;
++#include <errno.h>
+ 
+ extern int error_intr;
+ extern int error_nomem;