Subject: Closing guix system --target support

From: Mathieu Othacehe <[email-masked]>
Date: Fri, 15 Nov 2019 17:39:23 +0100

Hello,

I pushed the few remaining bits of the serie to core-updates, which
means that it should be possible to cross compile a guix system on that
branch.

There's still some work to do because some packages (and build-systems)
have broken or no cross-compilation support.

Mathieu