xfstests: drop "Mount point match" from 028 and 047 golden output

xfstests: drop "Mount point match" from 028 and 047 golden output

Bill Kendall's latest update to xfsdump dropped a line of output
that served no real purpose.  This change updates the golden output
for the two tests that included that line of output.

Updated to filter out that line from dump output also, so old
versions of the code will still produce the same output (suggested
by Dave Chinner).

Signed-off-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>