message: correct build for helper-images
diff: @@ -230,7 +230,7 @@ build-helperimages = $(foreach image,$(helperimages),build/$(image))
  $(build-helperimages):
  $(eval image = $(subst build/,,$@))
  - $(call docker_build,$(image),helpers/$(folder)/Dockerfile,helpers/$(folder))
  + $(call docker_build,$(image),helpers/$(image)/Dockerfile,helpers/$(image))
  touch $@
  build/local-hiera-watcher-pusher build/local-git-server: build/centos7
  