pgsql: Update timezone data files to release 2007h of the zic database.

Log Message:
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Update timezone data files to release 2007h of the zic database.
Might as well have the latest when we wrap 8.3beta1.

Tags:
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REL8_1_STABLE

Modified Files:
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pgsql/src/timezone/data:
africa (r1.2.2.3 -> r1.2.2.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/africa?r1=1.2.2.3&r2=1.2.2.4)
asia (r1.3.2.2 -> r1.3.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/asia?r1=1.3.2.2&r2=1.3.2.3)
southamerica (r1.3.2.2 -> r1.3.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/southamerica?r1=1.3.2.2&r2=1.3.2.3)