Add ORDER BY to regression test case

Peter Eisentraut <peter@eisentraut.org>

Commit: c77e12208cd8540a209cc698373a3cfba8802639
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2019-03-25T07:15:38Z
Releases: 12.0
Add ORDER BY to regression test case

Apparently, the output order is different on different endianness, per
build farm member snapper.

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