xfsprogs: sync the changes in transaction log space reservations to user space

xfsprogs: sync the changes in transaction log space reservations to user space

Sync the kernel code changes regarding transaction log space
reservations to user space.

As we have splitted the calculation of attrset log space reservations
into mount time and runtime in kernel code, here we need to fix
max_attrset_trans_res_adjust() to reflect this change.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Mark Tinguely <tinguely@sgi.com>