[ASAN/AArch64] Fix kernel_old_Xid_t type

[Renato Golin]

On 30 September 2014 14:52, Evgeniy Stepanov <eugeni.stepanov at gmail.com> wrote:
> Oops.
> That was by accident.
> This sounds ridiculous indeed, but should I revert this part of
> r218605 and commit separately?

I don't think it matters much.

cheers,
--renato