decl.c: Include diagnostic-core.h.

	* gcc-interface/decl.c: Include diagnostic-core.h.
	(gnat_to_gnu_entity) <E_Array_Type>: Sorry if Reverse_Storage_Order
	is set on the entity.
	<E_Record_Type>: Likewise.
	* gcc-interface/Make-lang.in (ada/decl.o): Add $(DIAGNOSTIC_CORE_H).

From-SVN: r195694