dns/ldns: Fix ldns-config

After the last update ldns-config is producing wrong information and at least
dns/opendnssec and dns/opendnssec2 are failing to build.

PR:		240297
Submitted by:	Jaap Akkerhuis <jaap@NLnetLabs.nl> (maintainer)
Reported by:	Roman Serbski <mefystofel@gmail.com>

dns/ldns/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	ldns
 PORTVERSION=	1.7.1
+PORTREVISION=	1
 CATEGORIES=	dns
 MASTER_SITES=	https://www.nlnetlabs.nl/downloads/ldns/ \
 		LOCAL/ehaupt

dns/ldns/files/patch-packaging_ldns-config.in

@@ -0,0 +1,13 @@
+--- packaging/ldns-config.in.orig	2019-09-03 13:07:40 UTC
++++ packaging/ldns-config.in
+@@ -1,6 +1,10 @@
+ #!/bin/sh
+ 
++prefix="@prefix@"
++exec_prefix="@exec_prefix@"
+ VERSION="@PACKAGE_VERSION@"
++CFLAGS="@CFLAGS@"
++CPPFLAGS="@CPPFLAGS@ @LIBSSL_CPPFLAGS@ @PYTHON_CPPFLAGS@"
+ LDFLAGS="@LDFLAGS@ @LIBSSL_LDFLAGS@ @PYTHON_LDFLAGS@"
+ LIBS="@LIBS@ @LIBSSL_LIBS@"
+ LIBDIR="@libdir@"