apps/iotune: add --fs-check option to use iotune for kernel version check
apps/iotune: add --fs-check option to use iotune for kernel version check

To use iotune for kernel version check, run filesystem_has_good_aio_support() then exit when --fs-check specified.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <1460398446-19942-1-git-send-email-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

dreamsxin/seastar,cloudius-systems/seastar,avikivity/seastar,scylladb/seastar,kjniemi/seastar,syuu1228/seastar,avikivity/seastar,scylladb/seastar,dreamsxin/seastar,avikivity/seastar,syuu1228/seastar,kjniemi/seastar,cloudius-systems/seastar,syuu1228/seastar,kjniemi/seastar,cloudius-systems/seastar,dreamsxin/seastar,scylladb/seastar