When building binaries, compile the whole package. (#1208)

Currently we have a single file so the effect is the same.
But it might save us some frustration if we ever add more, and this way
shows the intent better.

Makefile

@@ -70,12 +70,12 @@ manager-clean:
 run:
     # for local development, webhooks are disabled by default
     # if you enable them, you have to take care of providing the TLS certs locally
-	ENABLE_WEBHOOKS=${ENABLE_WEBHOOKS} go run -ldflags "${LDFLAGS}" ./cmd/manager/main.go
+	ENABLE_WEBHOOKS=${ENABLE_WEBHOOKS} go run -ldflags "${LDFLAGS}" ./cmd/manager
 
 .PHONY: deploy
 # Install KUDO into a cluster via kubectl kudo init
 deploy:
-	go run -ldflags "${LDFLAGS}" cmd/kubectl-kudo/main.go init
+	go run -ldflags "${LDFLAGS}" ./cmd/kubectl-kudo init
 
 .PHONY: deploy-clean
 deploy-clean:
@@ -93,7 +93,7 @@ generate-clean:
 .PHONY: cli-fast
 # Build CLI but don't lint or run code generation first.
 cli-fast:
-	go build -ldflags "${LDFLAGS}" -o bin/${CLI} cmd/kubectl-kudo/main.go
+	go build -ldflags "${LDFLAGS}" -o bin/${CLI} ./cmd/kubectl-kudo
 
 .PHONY: cli
 # Build CLI