xfstests: Show duration of current test

It may be useful to compare both times, last and current, in the
xfstests output.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>

check

@@ -275,13 +275,14 @@ do
 	    else
 		if diff $seq.out $tmp.out >/dev/null 2>&1
 		then
-		    echo ""
 		    if $err
 		    then
 			:
 		    else
 			echo "$seq `expr $stop - $start`" >>$tmp.time
+			echo -n " `expr $stop - $start`s"
 		    fi
+		    echo ""
 		else
 		    echo " - output mismatch (see $seq.out.bad)"
 		    mv $tmp.out $seq.out.bad