Add ecpg thread testing file.

Bruce Momjian <bruce@momjian.us>

Commit: 149f01c4d463744cd2fe504f017422bbb9e5440e
Author: Bruce Momjian <bruce@momjian.us>
Date: 2003-08-06T02:19:51Z
Releases: 7.4.1
Add ecpg thread testing file.

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