re PR libgcj/12416 (java.lang.Class.getFields returns duplicate entries.)

	PR libgcj/12416:
	* java/lang/Class.h: Updated.
	* java/lang/natClass.cc (_getFields): Removed.
	(getFields): Likewise.
	(getDeclaredFields): Added `public_only' parameter.
	* java/lang/Class.java (getFields): Now implemented in java; from
	Classpath.
	(getDeclaredFields): Likewise.
	(getDeclaredFields(boolean)): Declare.
	(_getFields): Removed.
	(internalGetFields): New method, from Classpath.

From-SVN: r72818