Fixed cleanup of 'terminado' and 'tornado' (#2872)
Fixed cleanup of 'terminado' and 'tornado' (#2872)

* Fixed cleanup of 'terminado' and 'tornado'
After creating the snap, these are directories containing files. So you
cannot delete them via 'rm'

* 'snapcraft clean nikola -s pull;snapcraft' produced an error

getnikola/nikola,xuhdev/nikola,okin/nikola,okin/nikola,okin/nikola,getnikola/nikola,okin/nikola,xuhdev/nikola,getnikola/nikola,xuhdev/nikola,getnikola/nikola,xuhdev/nikola