Fix some portability issues in isolation regression test driver.

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

Commit: eff223ffd74eed268f35d693462969f7f75632d2
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2011-05-08T23:45:00Z
Releases: 9.1.0
Fix some portability issues in isolation regression test driver.

Remove random system #includes in favor of using postgres_fe.h.  (The
alternative to that is letting this module grow its own configuration
testing ability...)

Also fix the "make clean" target to actually clean things up.

Per local testing.

Files