Bug#1068772: uhd-host: usrpctl fails to run

[A. Maitland Bottoms]

The quick fix is for you to install the python3-uhd package.

Fixing this bug will either be done by moving usrpctl
to the python3-uhd package, or just add python3-uhd
to the uhd-host Depends: list (or at least Recommends:).

-Maitland