[Bug localedata/18568] Update locale data to Unicode 8.0

["maiku.fabian at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18568

--- Comment #3 from Mike FABIAN <maiku.fabian at gmail dot com> ---
(In reply to Marko Myllynen from comment #1)
> The following Unicode Blog posting provides some comments about required
> implementation changes, however I haven't investigated how relevant these
> are from glibc perspective.

I think for glibc, this has little impact.

> http://blog.unicode.org/2015/03/unicode-80-beta-review.html
> 
> Unicode 8.0.0 comprises several changes which require careful migration in
> implementations, including the conversion of Cherokee to a bicameral script,

That means Cherokee has upper and lower case now, lots of characters
get added to "toupper", "tolower", "totitle" in the "i18n" file.

> a different encoding model for New Tai Lue, and additional character
> repertoire.

Many New Tai Lue characters which were combining characters before are
not combining characters anymore.

> Implementers need to change code and check assumptions regarding
> case mappings New Tai Lue syllables, Han character ranges, and confusables.

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