Make regression test output stable.

Heikki Linnakangas <heikki.linnakangas@iki.fi>

Commit: 1a56498e5f6db949a066fb125199a7389a798421
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2015-07-14T13:17:34Z
Releases: 9.6.0
Make regression test output stable.

In the test query I added for ALTER TABLE retaining comments, the order of
the result rows was not stable, and varied across systems. Add an ORDER BY
to make the order predictable. This should fix the buildfarm failures.

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