Build make.conf when the world is not selected to build, but the

kernel is.

PR:		151696
Submitted by:	lev@

tools/tools/nanobsd/nanobsd.sh

@@ -917,6 +917,9 @@ else
 fi
 
 if $do_kernel ; then
+	if ! $do_world ; then
+		make_conf_build
+	fi
 	build_kernel
 else
 	pprint 2 "Skipping buildkernel (as instructed)"