Wireguard Windows ARM64 Build 21327

[Jason A. Donenfeld]

Hi Bradley,

Thanks for the report.

> I'm not expecting my configuration to be supported or stressed over in the slightest.

You are in fact very mistaken here. Having everything be broken and
requiring you to resort to out of date versions is very much something
that I'll stress over. Let's fix this.

The first thing I'm wondering is:
- Did v0.3.8 work in builds prior to 21327, or did you never get a
chance to test v0.3.8 on other builds?

Jason