objdump: is_same_section

objdump: is_same_section

This fixes a deficiency in commit 660df28acfa1, which should have used
the same logic as that in sym_ok.  Ideally both places would not
compare section names, but it can be a little tricky to match a
section in the real object file with a section in a debug file.
Extend commit 39f0547e554d to use section name, vma and size.

	* objcopy (is_same_section): New function.
	(compare_symbols, sym_ok): Use it here.