fix golint failures on cmd/kubeadm/app

cmd/kubeadm/app/kubeadm.go

@@ -21,6 +21,8 @@ import (
 	"os"
 
 	"github.com/spf13/pflag"
+
+	// ensure libs have a chance to globally register their flags
 	_ "k8s.io/klog"
 
 	utilflag "k8s.io/apiserver/pkg/util/flag"

hack/.golint_failures

@@ -2,7 +2,6 @@ cmd/cloud-controller-manager/app/apis/config/v1alpha1
 cmd/kube-apiserver/app
 cmd/kube-controller-manager/app
 cmd/kube-proxy/app
-cmd/kubeadm/app
 cmd/kubeadm/app/apis/kubeadm/v1alpha3
 cmd/kubeadm/app/apis/kubeadm/v1beta1
 cmd/kubeadm/app/util/config