bfd/

bfd/
	* xcofflink.c (xcoff_archive_info): Add contains_shared_object_p
	and know_contains_shared_object_p.
	(xcoff_archive_contains_shared_object_p): Add an "info" parameter.
	Cache the result in the archive_info table.
	(xcoff_auto_export_p): Add an "info" parameter and update the
	call to xcoff_archive_contains_shared_object_p.
	(xcoff_mark_auto_exports): Update accordingly.
	(xcoff_post_gc_symbol): Likewise.