pgsql: Don't link PL/Python against LOCALMODLIBS This variable is

Log Message:
-----------
Don't link PL/Python against LOCALMODLIBS

This variable is apparently only for Python internally. In newer releases
of Python this variable pulls in more and more libraries that users are
less likely to have, leading to potential build failures.

Modified Files:
--------------
pgsql:
configure (r1.676 -> r1.677)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.676&r2=1.677)
pgsql/config:
python.m4 (r1.17 -> r1.18)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/config/python.m4?r1=1.17&r2=1.18)