Code review comment for lp:~nuclearbob/utah/media-info-mini

What was the output of `platform.machine()` call in that case?

According to the python documentation, when the machine type cannot be
determined, the empty string is returned. Hence, maybe the `arches` dictionary
in the `get_arch` function has to be updated and the 'unknown' value should be
inserted for the empty string (if another non empty value is returned, then we
should consider adding it to the `arches` dictionary as well).