Thread: pgbuildfarm - client-code: Try to unlimit core files if possible, and

Log Message:
-----------

Try to unlimit core files if possible, and try to get a gdb backtrace if possible when regression tests fail. None of
thisfails fatally, so if we can't do it the behaviour is the same as before. 

Modified Files:
--------------
    client-code:
        run_build.pl (r1.72 -> r1.73)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbuildfarm/client-code/run_build.pl.diff?r1=1.72&r2=1.73)