Re: readelf looping in process_archive

This patch fixes a leak of qualified_name caused by 4c836627 and a
double free introduced by fd486f32.  Not breaking out of the loop
results in an error: "failed to seek to next archive header".  That's
slightly better than silently preventing the possibility of endless
loops.

	* readelf.c (process_archive): Don't double free qualified_name.
	Don't break out of loop with "negative" archive_file_size, just
	set file offset to max.