use gopath as workdir for less warnings, dist in version for launchpad
use gopath as workdir for less warnings, dist in version for launchpad

vaporry/ethereum-buildbot,chfast/ethereum-buildbot,ethereum/ethereum-buildbot,vaporry/ethereum-buildbot,chfast/ethereum-buildbot,vaporry/ethereum-buildbot,ethereum/ethereum-buildbot,ethereum/ethereum-buildbot,chfast/ethereum-buildbot