* gnu/java/locale/LocaleHelper.java:
	(getLocalizedString(Locale,String,String,boolean,
	boolean)): Removed, no longer needed.
	(getFallbackLocale(Locale)): Implemented.
	* java/lang/String.java:
	(isEmpty()): Implemented.
	* java/util/Currency.java:
	(getSymbol(Locale)): Reimplemented to use SPI.
	* java/util/Locale.java:
	(ROOT): Added.
	* java/util/spi/CurrencyNameProvider.java:
	New file.
	* java/util/spi/LocaleServiceProvider.java:
	Likewise.
	* java/util/spi/package.html: Likewise.