xfs_repair: add d_type when moving files to lost+found

xfs_repair: add d_type when moving files to lost+found

When we move disconnected inodes to lost+found, they aren't
assigned a dtype.  Fix this by just setting XFS_DIR3_FT_UNKNOWN
for now.  If the files are moved out of lost+found, the type
will be properly set at that time.

When repair gains more type knowledge we could use xfs_mode_to_ftype[]
to set the proper type when moved, but right now it's not a big
deal; UNKNOWN will suffice for files in lost+found, and prevents
us from using an uninitialized value.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>