Populate /etc/atf with any missing files. Fixes PR bin/45870.

usr.sbin/postinstall/postinstall

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: postinstall,v 1.134 2012/02/22 16:42:07 apb Exp $
+# $NetBSD: postinstall,v 1.135 2012/02/27 17:56:14 jmmv Exp $
 #
 # Copyright (c) 2002-2008 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -1605,6 +1605,10 @@ do_atf()
 	op="$1"
 	failed=0
 
+	populate_dir "${op}" true \
+		"${SRC_DIR}/etc/atf" "${DEST_DIR}/etc/atf" 644 \
+		NetBSD.conf atf-run.hooks common.conf
+
 	if grep '[^#]*unprivileged-user[ \t]*=.*_atf' \
 		"${DEST_DIR}/etc/atf/common.conf" >/dev/null
 	then