fix(buildtool/spin): Emits built spin version to file. (#3909)
fix(buildtool/spin): Emits built spin version to file. (#3909)


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