Code review comment for ~pieq/bugit/+git/qabro:add-fwts-logs

I took into account Maciek's comment regarding

    _ = subprocess.call(...)

Otherwise, for now FWTS will be compiled when snapping qabro, unfortunately :S
(the reason is because qabro needs to support different archs, and the `source-type: deb` feature only works for single arch)