* gcc-interface/gigi.h (gnat_build_constructor): Take a VEC instead
	of a TREE_LIST.  Update comment.
	* gcc-interface/trans.c (gigi): Build a VEC instead of a TREE_LIST.
	Adjust call to gnat_build_constructor.
	(Attribute_to_gnu): Likewise.
	(gnat_to_gnu): Likewise.
	(pos_to_constructor): Likewise.
	(extract_values): Likewise.
	* gcc-interface/utils.c (build_template): Likewise.
	(convert_vms_descriptor64): Likewise.
	(convert_vms_descriptor32): Likewise.
	(convert_to_fat_pointer): Likewise.
	(convert): Likewise.
	(unchecked_convert): Likewise.
	* gcc-interface/decl.c (gnat_to_gnu_entity): Likewise.
	* gcc-interface/utils2.c (build_allocator): Likewise.
	(fill_vms_descriptor): Likewise.
	(gnat_build_constructor): Take a VEC instead of a TREE_LIST.
	(compare_elmt_bitpos): Adjust for parameters being constructor_elts
	instead of TREE_LISTs.

From-SVN: r161529