debuild: Another dependency name change in Debian Testing/Unstable.

There you go. I forgot to add that commit to !831 (merged), sorry about that.

requested review from @jwilkes

assigned to @jwilkes

added bugfix label

Jonathan, sorry again to bug you with this. It's a trivial change, it only affects the debuild, but it's absolutely needed for Debian Testing and Unstable, so a merge would be much appreciated, thanks. :)

Great, I'll take a look tonight.

merged