Use “,” as mon_decimal_point for ru_RU and os_RU locales (follow CLDR)

	[BZ #13805]
	* locales/ru_RU (LC_MONETARY): Use “,” for mon_decimal_point
	(to agree with CLDR).
	* locales/ru_RU (LC_NUMERIC): Write mon_decimal_point in ASCII
	for readability.
	* locales/os_RU (LC_MONETARY): Copy from ru_RU,
	makes it agree with CLDR.