Use make as the main build tool

This allows us to start building real dependencies into Makefile.

Leave old hack/* scripts in place but advise to use 'make'.  There are a few
rules that call things like 'go run' or 'build/*' that I left as-is for now.

hack/dev-push-hyperkube.sh

@@ -45,7 +45,7 @@ fi
 
 kube::build::verify_prereqs
 kube::build::build_image
-kube::build::run_build_command hack/build-go.sh cmd/hyperkube
+kube::build::run_build_command make WHAT=cmd/hyperkube
 
 REGISTRY="${KUBE_DOCKER_REGISTRY}/${KUBE_DOCKER_OWNER}" \
 VERSION="${KUBE_DOCKER_VERSION}" \