xfs_logprint: dump new attr log item fields

xfs_logprint: dump new attr log item fields

Dump the new extended attribute log item fields.  This was split out
from the previous patch to make libxfs resyncing easier.  This code
needs more cleaning, which we'll do in the next few patches before
moving on to the parent pointer code.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>