Fix timezone detection on Japanese/Korean Windows

ICU's Windows timezone detection is broken on Japanese/Korean
(and potentially other non-English) Windows.

Cherrypick the upstream fix.
See http://bugs.icu-project.org/trac/ticket/13826 .

TBR=gsathya@chromium.org
Bug: 849724
Test: Set the timezone to Tokyo on Japanese Windows
Test: In JS console, 'new Date()' outputs 'Japan Standard Time' in parens.
Change-Id: Ie76c1e97ee2e965825f2fe99442c55e797b45f41
Reviewed-on: https://chromium-review.googlesource.com/1094322
Reviewed-by: Jungshik Shin <jshin@chromium.org>
3 files changed