fix(buildtool): support utf-8 output from subprocesses.
fix(buildtool): support utf-8 output from subprocesses.

spinnaker/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,skim1420/spinnaker,skim1420/spinnaker,skim1420/spinnaker,duftler/spinnaker,ewiseblatt/spinnaker,spinnaker/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,spinnaker/spinnaker,ewiseblatt/spinnaker,spinnaker/spinnaker,skim1420/spinnaker,duftler/spinnaker