* tree.c (verify_type_variant): Skip TYPE_SIZE and TYPE_SIZE_UNIT if
	they are both PLACEHOLDER_EXPRs.
ada/
	* gcc-interface/decl.c (set_nonaliased_component_on_array_type): New
	function.
	(set_reverse_storage_order_on_array_type): Likewise.
	(gnat_to_gnu_entity) <E_Array_Type>: Call them to set the flags.
	<E_Array_Subtype>: Likewise.
	<E_String_Literal_Subtype>: Likewise.
	(substitute_in_type) <ARRAY_TYPE>: Likewise.
	* gcc-interface/utils.c (gnat_pushdecl): Always create a variant for
	the DECL_ORIGINAL_TYPE of a type.

From-SVN: r237658