patch to check ld

[Benjamin Kosnik]

FYI this is the snippet of email that prompted the decision to add the flags:

> GNU ld does try to mitigate the problem by adapting the hash table
> size (and thus hash key modulus) to minimize hash collisions, chain
> length, and number of pages in the hash table.  It's pretty slick.

But you have to add -O1 to the linker line which most people don't do
(not -O1 on the compiler line).