[PATCH] pg_test_fsync: Delete temporary file when aborted by a signal

Hi list,

I found a 'pg_test_fsync.out' file in my $PGDATA, which was probably
left around because I aborted pg_test_fsync with ^C back when setting
up the server.

Here's a patch to delete that file via a signal handler for
SIGINT/SIGTERM/SIGHUP.

Not tested on Windows, but should work according to MSDN documentation.

Regards,
Marti