release.nix: Add dependency on Guile.

Dependencies

• [2] 7DWCXNC7 Use the new Nix Perl bindings
• [*] SAFVRDTK * Put Hydra's dependencies so that they can easily be installed in a

Change contents

• edit in deps.nix at line 39
  [2.14]

  [4.497]
  + guile # optional, for Guile + Guix support