Calendar.java: Implement Comparable<Calendar>.

Calendar.java: Implement Comparable<Calendar>.

	* java/util/Calendar.java: Implement Comparable<Calendar>.  Update
	comments.
	(clear): Call complete.
	(setTimeZone): Call computeTime, computeFields.
	(compareTo): New method.
	* java/nio/charset/Charset.java: Implement Comparable<Charset>.
	(availableCharsets): Genericized.
	(aliases): Likewise.
	(compareTo): Changed argument type.
	* java/lang/ClassLoader.java (loadClass): Genericized.
	(findClass): Likewise.
	(defineClass): Likewise.
	(resolveClass): Likewise.
	(findSystemClass): Likewise.
	(setSigners): Likewise.
	(findLoadedClass): Likewise.
	(getResources): Likewise.
	(findResources): Likewise.
	(getSystemResources): Likewise.
	(checkInitialized): New method.
	* java/lang/Class.java (getCanonicalName): New method.

From-SVN: r121471