d/control: Add XSBC-Original-* Fields

This makes sure we follow the practices documented under
https://tracker.pureos.net/w/development/packaging_overview/

Closes https://tracker.pureos.net/T1030
5 jobs for adjust_vcs in 18 minutes and 57 seconds (queued for 1 second)
Status Job ID Name Coverage
  Package
passed #368942
librem5
package-pureos-byzantium

00:04:55

passed #368943
librem5:arm64
package-pureos-byzantium:arm64

00:18:57

 
  Test Package
passed #368944
librem5
autopkgtest-pureos-byzantium-package

00:01:17

passed #368946
librem5
check-tarball

00:00:45

passed #368945
librem5
lintian-pureos-byzantium-package

00:00:40