test: Add external mbuto profile, drop udhcpc, and switch to it

This depends on a future change in mbuto to accept external profile
files. Add a file defining what we need for tests and demos, dropping
udhcpc and script as they're not needed anymore, and switch to it.

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

test/demo/passt

@@ -56,7 +56,7 @@ say	Let's create a small initramfs image for the guest.
 guest	cd __TEMPDIR__
 guest	git clone git://mbuto.sh/mbuto
 guest	cd mbuto
-guest	./mbuto -f passt.img -p passt -c lz4
+guest	./mbuto -f passt.img -p __TEMPDIR__/passt/test/passt.mbuto -c lz4
 sleep	2
 
 nl

test/lib/setup

@@ -34,7 +34,7 @@ setup_passt() {
 	pane_run GUEST "git -C ${__mbuto_dir} clone git://mbuto.sh/mbuto"
 	pane_status GUEST
 
-	pane_run GUEST "${__mbuto_dir}/mbuto/mbuto -p passt -c lz4 -f mbuto.img"
+	pane_run GUEST "${__mbuto_dir}/mbuto/mbuto -p test/passt.mbuto -c lz4 -f mbuto.img"
 	pane_status GUEST
 
 	rm -rf "${__mbuto_dir}"

test/passt.mbuto

@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# PASST - Plug A Simple Socket Transport
+#  for qemu/UNIX domain socket mode
+#
+# test/passt.mbuto - mbuto (https://mbuto.sh) profile for test images
+#
+# Copyright (c) 2022 Red Hat GmbH
+# Author: Stefano Brivio <sbrivio@redhat.com>
+
+PROGS="${PROGS:-ash,dash,bash ip mount ls insmod mkdir ln cat chmod lsmod
+       modprobe find grep mknod mv rm umount jq iperf3 dhclient busybox logger
+       sed tr chown sipcalc cut md5sum nc dd strace ping tail killall sleep
+       sysctl nproc tcp_rr tcp_crr udp_rr which tee seq bc}"
+
+KMODS="${KMODS:- virtio_net virtio_pci}"
+
+LINKS="${LINKS:-
+	 ash,dash,bash		/init
+	 ash,dash,bash		/bin/sh
+	 ash,dash,bash		/usr/bin/bash}"
+
+COPIES="${COPIES}
+	/sbin/dhclient-script"
+
+DIRS="${DIRS} /tmp"
+
+FIXUP="${FIXUP}
+	:> /etc/fstab
+	sh +m
+"
+
+OUTPUT="KERNEL=__KERNEL__
+INITRD=__INITRD__
+"