Fix ICU data file for Android

In some locales, currency data turns empty after currency list filtering
on Android. This leads v8's currency formatter to fall back to 3-letter
currency code instead of currency symbol (e.g. 'GBP' in en-GB).

Fix the ICU data trimming script to remove an empty Currency block after
filtering and rebuild ICU data files.

Bug: 870338
Test: See the bug
TBR=gsathya@chromium.org
Change-Id: Idf7af0a5f00b05b7f26d2ad42b21abd1aca47d07
Reviewed-on: https://chromium-review.googlesource.com/1184505
Reviewed-by: Jungshik Shin <jshin@chromium.org>

Author: jungshik

android/icudtl.dat

@@ -50,8 +50,17 @@ do
      /^    [cC]urrency(Map|Meta|Spacing|UnitPatterns)\{$/, /^    \}$/ p
      /^    Version\{.*\}$/p
      /^\}$/p' $i
+
+    # Delete empty blocks. Otherwise, locale fallback fails.
+    # See crbug.com/791318 and crbug.com/870338 .
+    sed -r -i \
+      '/^    Currenc(ie.*|yPlurals)\{$/ {
+         N
+         /^    Currenc(ie.*|yPlurals)\{\n    \}/ d
+      }' "${i}"
 done
 
+
 # Chrome on Android is not localized to the following languages and we
 # have to minimize the locale data for them.
 EXTRA_LANGUAGES="bn et gu kn ml mr ms ta te"