Sync zoneinfo database with tzdata2007c from elsie.

Sync zoneinfo database with tzdata2007c from elsie.

europe:         8.7  -> 8.8
northamerica:   8.11 -> 8.12
southamerica:   8.8  -> 8.9
zone.tab:       8.8  -> 8.9

From Paul Eggert's comments:

* Turkey switches at 01:00 standard time, not at 01:00 UTC.  (Thanks to
  Amar Devegowda and Steffen Thorsen for this.)

* Pulaski County, Indiana, is switching from CST/CDT to EST/EDT next
  month (which means a 2-hour change on March 11).  This requires a
  new Zone, America/Indiana/Winamac.  (Thanks to Gwillim Law for the
  heads-up.)

* A slight correction to Easter Island Mean Time (1890-1932).

* Update comments for Canada.  (Thanks to Chris Walton.)