Bug#883769: please package amd64 cross-toolchain

[Leif Lindholm]

Package: build-essential
Severity: wishlist

I have migrated to mainly using arm64 platforms for my daily work, but
some of it I also need to test/validate for x86 platforms.
This would be a lot smoother if I had an x86_64-linux-gnu- toolchain
packaged as well.