Make sure to create the directory for cni config

Otherwise it will be created with the mktemp permissions
and become unreadable (0700), making chmod fail later on.

pkg/minikube/cni/bridge.go

@@ -19,6 +19,7 @@ package cni
 import (
 	"bytes"
 	"fmt"
+	"os/exec"
 	"text/template"
 
 	"github.com/pkg/errors"
@@ -84,6 +85,10 @@ func (c Bridge) Apply(r Runner) error {
 		return fmt.Errorf("bridge CNI is incompatible with multi-node clusters")
 	}
 
+	if _, err := r.RunCmd(exec.Command("sudo", "mkdir", "-p", "/etc/cni/net.d")); err != nil {
+		return err
+	}
+
 	f, err := c.netconf()
 	if err != nil {
 		return errors.Wrap(err, "netconf")