enable libelf

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.222 2017/10/17 09:34:52 mpi Exp $
+#	$OpenBSD: Makefile,v 1.223 2019/02/04 23:23:18 jsg Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -42,7 +42,7 @@ LDIRS=	crypto ddb dev isofs miscfs msdosfs net netinet netinet6 \
 PRDIRS=	../lib/libcrypto ../lib/librpcsvc
 
 # Directories with an includes target
-RDIRS=	../lib/libcurses ../lib/libedit \
+RDIRS=	../lib/libcurses ../lib/libedit ../lib/libelf \
 	../lib/libevent ../lib/libexpat ../lib/libform \
 	../lib/libfuse ../lib/libkeynote ../lib/libmenu \
 	../lib/libossaudio ../lib/libpanel ../lib/libpcap \