pgsql: Make pg_dumpall's database ACL query independent of hash table o

Make pg_dumpall's database ACL query independent of hash table order.

Previously GRANT order on databases was not well defined, due to the use
of EXCEPT without an ORDER BY.  Add an ORDER BY, adapt test output.

I don't, at the moment, see reason to backpatch this.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/b4fc645787cc7c614c0c97fc9fffacf2bdc6a388

Modified Files
--------------
src/bin/pg_dump/pg_dumpall.c     | 10 ++++++----
src/bin/pg_dump/t/002_pg_dump.pl |  1 +
2 files changed, 7 insertions(+), 4 deletions(-)