* gcc-interface/gigi.h (enum standard_datatypes): Add new value

	* gcc-interface/gigi.h (enum standard_datatypes): Add new value
	ADT_exception_data_name_id.
	(exception_data_name_id): New define.
	* gcc-interface/trans.c (gigi): Initialize it.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Use the standard
	exception type for standard exception definitions.  Do not make them
	volatile.
	<E_Record_Type>: Equate fields of types associated with an exception
	definition to those of the standard exception type.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159452 138bc75d-0d04-0410-961f-82ee72b054a4