Build KLD modules, these work for both a.out and elf.

sys/Makefile

@@ -1,4 +1,4 @@
-#	$Id: Makefile,v 1.12 1998/10/04 00:42:08 gpalmer Exp $
+#	$Id: Makefile,v 1.13 1998/10/11 18:39:38 rnordier Exp $
 
 # This is the old aout only boot loader.
 .if	exists(${MACHINE}/boot) && ${OBJFORMAT} == "aout"
@@ -11,6 +11,9 @@ SUBDIR=	boot
 SUBDIR= boot
 .endif
 
+# KLD modules build for both a.out and ELF
+SUBDIR+=modules
+
 HTAGSFLAGS+= -at `awk -F= '/^RELEASE *=/{release=$2}; END {print "FreeBSD", release, "kernel"}' < conf/newvers.sh`
 
 .include <bsd.subdir.mk>