fio: allow to combine terse output with any selected output type

fio: allow to combine terse output with any selected output type

This patch adds the option --append-terse to be able to request a
combination of any given selected output format AND terse output based
on the same data.

This will help all users that want to parse the terse data for further
use, but need to look into the logs every now and then which then should
be readable.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <axboe@fb.com>