* gcj/javaprims.h (_Jv_RegisterClassHook):  New extern declaration.
	(_Jv_RegisterClassHookDefault):  Likewise.
	* java/lang/Class.h (_Jv_RegisterClassHookDefault):  Declare as friend.
	* java/lang/natClassLoader.cc (_Jv_RegisterClassHook):  New variable.
	(_Jv_RegisterClassHookDefault):  New.function.
	(_Jv_RegisterClasses):  Call _Jv_RegisterClassHook.

From-SVN: r45344