* lib/ld-lib.exp (run_dump_test): Don't require a dump program if

	* lib/ld-lib.exp (run_dump_test): Don't require a dump program if
	#warning given.  Rearrange to allow $program to remain unset.
	Don't allow gas errors.  Append objcopy_as_link output to that
	from the linker before testing against expected output.  Fail the
	test if warning not found when expected.  Conversely fail the
	test if ld errors or warnings given when not expected.