[PATCH] D40632: Add flag to ArchiveWriter to test GNU64 format more efficiently

[Rafael Avila de Espindola via llvm-commits]

Jake Ehrlich via Phabricator <reviews at reviews.llvm.org> writes:
>  using namespace llvm;
>  
> +static cl::opt<int> Sym64PowerOfTwo("sym64-power-of-two", cl::Hidden,
> +                                    cl::init(32));
> +

Add a comment saying why we have this option.

LGTM with that.

Thanks,
Rafael