drbd: add explicit drbd_md_sync to drbd_resync_finished

As we usually update the generation UUIDs here, we should explicitly
sync them to disk.  So far this has been done only implicitly by related
code paths.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
1 file changed