Update timezone db to 2017b

See

  http://mm.icann.org/pipermail/tz-announce/2017-March/000046.html

for details.

  - Haiti resumed observing DST.

Data file size changes:

   android/icudtl.dat 6573792 =>  6573872
   common/icudt*.dat 10130480 => 10130560

BUG=473288
TEST=Try the following in d8 or Chrome's JS console:
 > (new Date("3/12/2016 12:00Z")).toLocaleString("en", {timeZone:
 "America/Port-au-Prince"})
 "3/12/2016, 7:00:00 AM"
 > (new Date("3/12/2017 12:00Z")).toLocaleString("en", {timeZone:
 "America/Port-au-Prince"})
 "3/12/2017, 8:00:00 AM"

Review-Url: https://codereview.chromium.org/2807343004 .
4 files changed