ICU update to 54 - step 4

ICU update to 54 - step 4

Google's locale data changes are applied before Chrome's own locale data
trimming.

1. Use "Rs." instead of the Indian Rupee sign (U+20A8) for which the font
   support is not available on all platforms.
   Google platforms (CrOS / Android ) have them, but other
   platforms may not.
2. Use shorter names for Hong Kong and Macau without 'S.A.R.' at the
   end. This cuts down the data size a bit.
3. Timezone names for Korea standard time and a couple of other zones
   are shortened.
4. zh_Hant_TW, pa_Arab_PK and a few more locales are changed.

Besides, update data.build.patch and README.chromium to drop
the collation rule files ('-R' option to genrb.). This should have been
done in ICU update step 2.

Data size checkpoint: 20,066,624 bytes
 - about 500k reduction from step 3 mostly due to '-R' option with
    the rest attributed to shorter display names for HK, MO and Korean tz.
 - the original ICU 54.1 : 25,343,024

BUG=428145
TEST=NONE
TBR=mark

Committed: https://chromium.googlesource.com/chromium/deps/icu/+/7f05ab4041662d364f0694b70dbef60a64e2aec7

[jungshik at Google, 2015-01-20 23:40:46]

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

[jungshik at Google, 2015-01-21 22:58:17]

Committed patchset #2 (id:20001) manually as
7f05ab4041662d364f0694b70dbef60a64e2aec7 (presubmit successful).