f2fs-tools: add fibmap

This is to get physical location of file data.
We can check the percentage of fragmentation on a file.

Note that it uses fsync to get exact blkaddr.

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