hr_HR locale: Don’t use single code points for the digraphs in LC_TIME

hr_HR locale: Don’t use single code points for the digraphs in LC_TIME

	[BZ #10580]
	* localedata/locales/hr_HR (LC_TIME): Use two letters for the
	digraphs in the month and day names. Using single code points for
	digraphs is deprecated.  While there are dedicated Unicode
	codepoints, for the digraphs, these are included for backwards
	compatibility and modern texts use a sequence of Basic Latin
	characters. See: https://www.unicode.org/faq/ligature_digraph.html
	This makes the month and day names agree exactly with CLDR now,
	CLDR does not use the single code points for the digraphs either.