Italian and Swiss locales: Use the correct separators (bug 10797).

CLDR and many other sources say that it_IT (Italian) should use a dot
(".") as a thousands separator and a comma (",") as a decimal separator.

For it_CH and de_CH CLDR says that they should use the Right Single
Quotation Mark ("’") as a thousands separator and a dot (".") as a
decimal separator.  Consequently, the same rules are copied to all other
locales in Switzerland.

These rules apply to both LC_MONETARY and LC_NUMERIC.

	[BZ #10797]
	* localedata/locales/de_CH (mon_thousands_sep): Use "<U2019>" (Right
	Single Quotation Mark).
	(thousands_sep): Likewise.
	* localedata/locales/it_CH (LC_NUMERIC): Use “copy "de_CH"”.
	* localedata/locales/it_IT (thousands_sep): Use ".".
	(grouping): Use "3;3".