ICU update to 54.1 - step 5

ICU update to 54.1 - step 5

1. Apply Chrome's locale data change on top of Google's locale data
   changes

2. Breakiterator changes
  - Apply brkitr.patch with update to ICU 54.1; line/word.txt
  - Check in a more compact Khmer dictionary along with
    a parameter adjustment in dictbe.cpp
  - Add a few common words to the CJ dictionary
  - Update brklocal.mk (out customized build file) to ICU 54
  - Update android/brkitr.patch and data/brkitr/word_ja.txt for Android

Data size checkpoint:
 * Non-Android: 19,575,216 bytes. ~500kB reduction relative
   to the previous step comes mainly from the compact Khmer dictionary.
 * Android: 17,601,520 bytes. 2MB difference comes from removing cjdict.

BUG=428145
TEST=net_unittests --gtest_filter="*IDN*"
TEST=layout tests
R=mark@chromium.org

Committed: https://chromium.googlesource.com/chromium/deps/icu/+/4a0ebf1135eb3f2ac241790c41d3c2e7b2c7c689

[jungshik at Google, 2015-01-23 00:48:13]

jshin@chromium.org changed reviewers:
+ mark@chromium.org

[jungshik at Google, 2015-01-23 00:48:14]

Mark, sorry for bothering you again. There are a few more steps. (the 2nd half
of item 5 in README, 6 + 7 + 9 except for windows data. And finally the windows
data).

[Mark Mentovai, 2015-01-23 04:46:59]

No worries. LGTM.

[jungshik at Google, 2015-01-23 23:03:33]

Committed patchset #5 (id:50001) manually as
4a0ebf1135eb3f2ac241790c41d3c2e7b2c7c689 (presubmit successful).