Copy everything found in mkosi/extra/ to the image

This is very convenient to add anything to the image "on the fly".

Don't use --delete because this could interfere with ndctl/

Signed-off-by: Marc Herbert <[email protected]>

Author: marc-hb

run_qemu.sh

@@ -1008,8 +1008,6 @@ check_ndctl_dir()
 
 prepare_ndctl_build()
 {
-	cp "${script_dir}"/mkosi/extra/root/reinstall_ndctl.sh \
-		mkosi.extra/root/
 	cat <<- 'EOF' > mkosi.postinst
 		#!/bin/sh
 		# v14: 'systemd-nspawn"; v15: "mkosi"
@@ -1127,6 +1125,8 @@ make_rootfs()
 		process_mkosi_template "$tmpl" > "$dst"
 	done
 
+	rsync -a "${script_dir}"/mkosi/extra/  mkosi.extra/
+
 	# misc rootfs setup
 	mkdir -p mkosi.extra/root/.ssh
 	local pubk