ICU 56 step 2

Make the tree ready for the application Google's and Chrome's data
and post-56 code patches.

1. Fix trim_data.sh to run from anywhere.
2. Update patch_locale.sh for Android and add en_IN to the locale list
3. Apply data.build.patch
4. Exclude non-UI locale data for unit locale category
5. Add some regional variant locales to locale, unit, zone and coll.
6. Update locale lists for locale, unit, zone, and coll

BUG=575007
TEST=None
R=mark@chromium.org

Review URL: https://codereview.chromium.org/1624643003 .
8 files changed