Fixes for tpi_PG locale

	* localedata/locales/tpi_PG (LC_MESSAGES): Fix yesexpr and noexpr
	by adding the generic +1 and -0 as in all other locales.
	* localedata/locales/tpi_PG (LC_TIME): Fix some typos in the month and
	day names and make it more readable by using ASCII where possible.