mocks for inlined interfaces

[nikolaydubina]

Is it possible? are there plans? to generate mocks for inlined interfaces?

Emplloyee.address field here would need mock generated:

package main

import "fmt"

type Employee struct {
	address interface {
		StreetName() string
		BlockNumber() int
	}
}

func main() {
	var e Employee
	fmt.Printf("%#v", e)
}

possibly we can match with -name=Employee.address notation.

issue: #531