Trim unit* sections in data/locales/*

Add 'filter_locale_data' function to trim_data.sh

Chromium/Blink do not use most of unit* sections in locale data. Keep
only duration and compound sub-sections. 

Update the icudtl.dat and two assembly source files for Mac/Linux.

It saves ~200kB (uncompressed). 7z-compressed size reduction is 34kB.

With all these changes (up to this CL) applied, the net increase of the ICU data from icu 46 to 52 is 49kB with 7z-compressed.
(3,070,246 vs  3,021,457) and ~ 390kB uncompressed (10,370,656 vs 9,980,368 ). 

BUG=132145
TEST=None.
TBR=mark

Review URL: https://codereview.chromium.org/247663002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu52@265354 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
71 files changed