deal with existing, but empty, reporting.yml
deal with existing, but empty, reporting.yml

Spotted while helping @anadahz to debug lepidopter.

juga0/ooni-probe,0xPoly/ooni-probe,juga0/ooni-probe,0xPoly/ooni-probe,0xPoly/ooni-probe,juga0/ooni-probe,0xPoly/ooni-probe,juga0/ooni-probe