f2fs-tools: add f2fstat to print f2fs's status in sec

This tool prints /sys/kernel/debug/f2fs/status in sec so that we
can monitor variation of f2fs status.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
4 files changed