dracut-reencrypt: add finished hook

A finished hook prevents dracut-initqueue from exiting and lets it
finish the batched jobs. Without a "finished hook" and without
"root=<dev>" on the kernel command line, the reencrypt job would not be
executed.

Normally you want to reencrypt without a "root=<dev>" on the kernel
command and want to reboot after the reencrypt job is done.

This patch adds the missing "finished hook".

misc/dracut_90reencrypt/parse-reencrypt.sh

@@ -24,4 +24,5 @@ if [ -n "$REENC_DEV" ] ; then
            /sbin/reencrypt $env{DEVNAME} %s"\n' "$REENC_KEY $REENC_SLOT $REENC_SIZE"
    printf 'LABEL="reenc_end"\n'
 } > /etc/udev/rules.d/69-reencryption.rules
+   initqueue --unique --finished --name crypt-reencrypt-finished-${REENC_DEV} [ -e /tmp/reencrypted ]
 fi