Fix distprep and maintainer-clean targets so that ecpg's .def files are

Tom Lane <tgl@sss.pgh.pa.us>

Commit: eefd10c66c5132521366ca1b48e3e3eafbf91d8b
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2007-10-05T01:51:40Z
Releases: 8.3.0
Fix distprep and maintainer-clean targets so that ecpg's .def files are
made and removed at the correct times.

Files