Go 1.12 new arches

New arches on Go 1.12 (windows/arm aix/somethinhsomething). No reason not to support them I guess?

aix/ppc64 didn’t build (probably the exotic fs notifications stuff; I didn’t investigate for more than a millisecond).

windows/arm I haven’t looked at at all. What’s that, like Windows Phone or something? Is there Windows on the desktop on arm?

Apparently windows iot (desktop) edition on rpi