Add gitignore files for ecpg regression tests.

Magnus Hagander <magnus@hagander.net>

Commit: c2067942c828c2ac601f8c06e7cbebbd7b6057a9
Author: Magnus Hagander <magnus@hagander.net>
Date: 2010-09-22T19:49:15Z
Releases: 8.2.18
Add gitignore files for ecpg regression tests.

Backpatch to 8.2 as that's how far the structure looks the same.

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