[tex-hyphen] Hyphenation patterns for Belarusian

[Maksim Salau]

>   Since I’ve been working on a library for pattern manipulation, I’ve
> just extended it to report conflicts in pattern sets, and I find 156 of
> them in the LibreOffice pattern file for Belarusian, which I copy in
> full because they’re quite interesting:

Thank you, Arthur!

I'll review patterns and return when xetex will not complain.

Best regards,
Maksim.