class.c (alter_access): Accept a BINFO explaining how to get from the entity whose accessed is being...

	* class.c (alter_access): Accept a BINFO explaining how to get
	from the entity whose accessed is being altered to the type doing
	the altering.
	(handle_using_decl): New function containing code split out from ...
	(finish_struct_1): Here.

From-SVN: r20500