pgsql: Update time zone data files to tzdata release 2008c (DST law

Log Message:
-----------
Update time zone data files to tzdata release 2008c (DST law changes in
Morocco, Iraq, Choibalsan, Pakistan, Syria, Cuba, Argentina/San_Luis).

Tags:
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REL8_1_STABLE

Modified Files:
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    pgsql/src/timezone/data:
        africa (r1.2.2.4 -> r1.2.2.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/africa?r1=1.2.2.4&r2=1.2.2.5)
        asia (r1.3.2.5 -> r1.3.2.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/asia?r1=1.3.2.5&r2=1.3.2.6)
        backward (r1.3.2.3 -> r1.3.2.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/backward?r1=1.3.2.3&r2=1.3.2.4)
        northamerica (r1.3.2.5 -> r1.3.2.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/northamerica?r1=1.3.2.5&r2=1.3.2.6)
        southamerica (r1.3.2.5 -> r1.3.2.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/southamerica?r1=1.3.2.5&r2=1.3.2.6)
        zone.tab (r1.3.2.4 -> r1.3.2.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/zone.tab?r1=1.3.2.4&r2=1.3.2.5)