bfd/

bfd/
	* coff-rs6000.c (member_layout): New structure.
	(archive_iterator): Likewise.
	(member_layout_init): New function.
	(archive_iterator_begin): Likewise.
	(archive_iterator_next): Likewise.
	(xcoff_write_armap_old): Use the new iterator functions.
	(do_shared_object_padding): Delete.
	(xcoff_write_armap_big): Use the new iterator functions.  Simplify
	handling of arch_info.
	(xcoff_write_archive_contents_old): Allocate arelt_data in the
	first loop rather than the second.  Allocate a member header if
	there isn't one, then work out the stat information and length
	in the first loop too.  Use the new iterators for the second loop.
	(xcoff_write_archive_contents_big): Likewise.