get more proper SSH package usage in

builder/qemu/ssh.go

 package qemu
 
 import (
-	gossh "code.google.com/p/gosshold/ssh"
+	gossh "code.google.com/p/go.crypto/ssh"
 	"fmt"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/communicator/ssh"

common/step_connect_ssh.go

 package common
 
 import (
-	gossh "code.google.com/p/gosshold/ssh"
+	gossh "code.google.com/p/go.crypto/ssh"
 	"errors"
 	"fmt"
 	"github.com/mitchellh/multistep"