Code review comment for lp://staging/~morphis/goget-ubuntu-touch/add-turbo-bootstrap-support

Thanks for your contribution, interesting to see what happened when bootloaders are not taken care of early ;-)

The only thing that worries me here is the fact that we only really format cache because there could be files from a failed "flash" there, by wiping we make sure there is enough space. Maybe a message about this when using turbo would be good and make for an easier troubleshoot.