asan: assert (addr_ranges) <= (start)

asan: assert (addr_ranges) <= (start)

That assert would be more obvious if it were reported as
"addr_ranges <= end_ranges".  Fix that by using the obvious variable
in the final loop.  Stop the assertion by using a signed comparison:
It's possible for the rounding up of the arange pointer to exceed the
end of the block when the block size is fuzzed.

	* dwarf.c (display_debug_aranges): Use "end_ranges" in loop
	displaying ranges rather that "start".  Simplify rounding up
	to 2*address_size boundary.  Use signed comparison in loop.