wlandebug: Add include path for libifconfig as it is a internallib

Reviewed by:	bapt
Differential Revision:	https://reviews.freebsd.org/D24172

lib/libifconfig/Makefile

@@ -10,8 +10,9 @@ SRCS=		libifconfig.c libifconfig_carp.c libifconfig_inet.c
 SRCS+=		libifconfig_inet6.c libifconfig_internal.c libifconfig_lagg.c
 SRCS+=		libifconfig_media.c
 
-INCSDIR=	${INCLUDEDIR}
-INCS=		libifconfig.h
+# If libifconfig become public uncomment those two lines
+#INCSDIR=	${INCLUDEDIR}
+#INCS=		libifconfig.h
 
 #MAN=		libifconfig.3
 

usr.sbin/wlandebug/Makefile

@@ -3,6 +3,7 @@
 PROG=	wlandebug
 MAN=	wlandebug.8
 
+CFLAGS+=	-I${SRCTOP}/lib/libifconfig
 LIBADD+=	ifconfig
 
 WARNS?=	2