postgres_fdw regression tests order dependency

It looks like the postgres_fdw's regression tests expect data back from 
the following statement in a given order, which presumably isn't guaranteed:
   UPDATE ft2 SET c2 = c2 + 600 WHERE c1 % 10 = 8 RETURNING *;

See 
<http://www.pgbuildfarm.org/cgi-bin/show_log.pl?nm=frogmouth&dt=2013-06-08%2018%3A30%3A00>

Maybe we need to wrap this in a CTE and then order the results for 
consistency?

cheers

andrew