Indicate 'V' verify state always

Indicate 'V' verify state always

We only print 'V' for a thread if it does a verify run after a write,
however fio can be invoked for a later verify using a different job file.
So check in do_io() as well and set verify state if appropriate.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>