xfs/122: update against xfsprogs 4.3

xfs/122: update against xfsprogs 4.3

Make the xfsprogs sb layout and structure size checker work with
modern xfsprogs (i.e. 4.3+ and all the new v5 stuff).  The old test
wasn't picking up structures because they're no longer defined in the
"typedef struct xfs_foo { } xfs_foo_t;" style.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>