recode-sr-latin: support for NFC accented characters

[Chusslove Illich]

In Serbian a vowel letter may have one of several accent diacritics mounted
as necessary, e.g. to disambiguate homonyms in close context or to more
precisely describe pronunciation; Serbian Cyrillic XKB layouts were recently
upgraded to enable typing accented letters. Most of those letters are
available only as NFD (combining diacritic), and thus recode-sr-latin will
convert them to Latin without issues.

However, eight of the accented letters are available as NFC too (ѐЀѝЍӣӢӯӮ),
and recode-sr-latin should be upgraded to convert them to their Latin NFC
counterparts. The attached patch is supposed to achieve this.

I've modified the unit test to check these additions; I've also replaced the
existing two lines with lower and uppercase equivalents of "Quick brown
fox...", to cover more possibilities.

-- 
Chusslove Illich (Часлав Илић)

recode-sr-latin-nfc-accents-01.diff
Description: Text Data

signature.asc
Description: This is a digitally signed message part.