Quick and Dirty Guix packages for dmd and dub x86_64

[Anthony Quizon via Digitalmars-d-announce]

Thought I would share this in case anyone else finds it useful.
I made quick guix packages of the latest dmd and dub binaries for 
x86 64 machines.

https://github.com/anthonyquizon/guix-channel/blob/master/anthonyquizon/packages/dlang.scm