switch to homebrew for xhyve

[nlf]

i know we discussed this at some point and said no because the xhyve binary is out of date, but i just noticed that a HEAD target is available in homebrew which builds the latest git revision. that would certainly work for our purposes.

[A.I.]

👍

[A.I.]

xhyve v0.2.0 has been released.
https://github.com/mist64/xhyve/releases/tag/v0.2.0

[Dave Cottlehuber]

+1 just use brew, less submodules. given how small dhyve is, perhaps it could go direct into xhyve? the proliferation of docker-helpers is .... confusing ... atm.