clear drill's dir when doing a release
clear drill's dir when doing a release

gegenschall/ldns,threatstack/libldns,benlaurie/ldns,threatstack/libldns,benlaurie/ldns,NLnetLabs/ldns,threatstack/libldns,threatstack/libldns,NLnetLabs/ldns,NLnetLabs/ldns,benlaurie/ldns,NLnetLabs/ldns,gegenschall/ldns,gegenschall/ldns,benlaurie/ldns,gegenschall/ldns,threatstack/libldns