刘海屏自动布局适配

1. xib或者sb针对safeArea布局就不会有问题
2. 纯代码

if #available(iOS 11.0, *) {
                make.top.equalTo(view.safeAreaLayoutGuide).offset(64)
            } else {
                // Fallback on earlier versions
                make.top.equalTo(view).offset(64)
            }