AArch64 fixes

[Andrew Haley]

On 22/11/16 15:19, Doug Simon wrote:

> You can directly create pull requests instead of opening issues if
> you already have the fixes. The granularity is up to you keeping in
> mind that isolating complex/risky changes in a separate PR makes
> reviewing easier as well as identifying gate breakage they may
> cause.

OK.  I'll do some experimenting to see what works best.

Andrew.