Load hyphenation data for more languages.

This loads hyphenation data for the languages we currently provide at
initialization time. It also has a poor man's locale fallback
mechanism for finding hyphenation patterns where the locale doesn't
exactly match what may be available and caches the results.

Bug: 20088132
Change-Id: If7b2a8d5295df9cb2bdae7418df27bf77fb44e58