Re: Fuzzed files in archives

Like commit ffbe89531c2e this avoids more silliness writing output
that is going to be deleted.  bfd_close and bfd_close_all_done differ
in that only the former calls _bfd_write_contents.

	* objcopy.c (copy_archive): Don't call bfd_close for elements
	that are going to be deleted, call bfd_close_all_done instead.
	Do the same for the archive itself.