Add some QEMU stuff for docker cross-builds

roles/desktop/defaults/main.yml

@@ -55,6 +55,8 @@ desktop_apt_packages:
   - git                                 # Just ensuring it's installed, probably already in build-essential
   - imagemagick                         # I use it from time to time to do scripted image editing
   - kubectl                             # From the Kubernetes repo, used to manage clusters
+  - qemu-user-static                    # Just some virtualization packages
+  - qemu-system-arm
   - stow                                # Used to manage dotfiles
 # - libinput-tools                      # Allows for libinput debugging
   - lua-check                           # Used in linting computercraft scripts