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/test-update-storage-objects.sh

@@ -92,7 +92,7 @@ function cleanup() {
 
 trap cleanup EXIT SIGINT
 
-"${KUBE_ROOT}/hack/build-go.sh" cmd/kube-apiserver
+make -C "${KUBE_ROOT}" WHAT=cmd/kube-apiserver
 
 kube::etcd::start