Add gitignore files for ecpg regression tests.

Magnus Hagander <magnus@hagander.net>

Commit: 6c137da018ad3ec52c872e0bb88c5968830e58d0
Author: Magnus Hagander <magnus@hagander.net>
Date: 2010-09-22T19:49:06Z
Releases: 9.1.0
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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