make sure to clean build dirs before making a package (#2083)
make sure to clean build dirs before making a package (#2083)


petrjasek/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core