Back-patch src/timezone/known_abbrevs.txt into all active branches.

Needed so that timezone data update patches can be cherry-picked
into older branches conveniently.
Update time zone data files to tzdata release 2013h.

DST law changes in Argentina, Brazil, Jordan, Libya, Liechtenstein,
Morocco, Palestine.  New timezone abbreviations WIB, WIT, WITA for
Indonesia.