[voicecall] Remove old copy of packaging, and packaging from makedist.

The canonical copy of packaging now lives in rpm/, so there's no need to do this
in two places.
[voicecall] Don't pretend a warning is a debug message.
[voicecall] Coalesce multiple copies of logging.
[voicecall] Silence debug by default.
[voicecall] Disable trace in tonegend plugin.
[voicecall] Silence debug from telepathy plugin by using the right macros.