build failure for remote target

[Liujingfang1]

This is a regression recently added to head

./kustomize build https://github.com/kubernetes/kubectl/docs/book/examples/nginx
Error: evalsymlink failure on '/tmp/kustomize-332098206/docs/book/examples/nginx' : lstat /tmp/kustomize-332098206/docs: no such file or directory

Using 2.0.3, we have

./kustomize build https://github.com/kubernetes/kubectl/docs/book/examples/nginx
apiVersion: v1
kind: Service
metadata:
  name: nginx
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 9376
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.7.9
        name: nginx
        ports:
        - containerPort: 80

[Liujingfang1]

We should also add a test for remote target to make sure such regression is detected.

[Liujingfang1]

This regress is caused by #857

[Liujingfang1]

@pst Can you take a look at this regression and see if you can fix it? Otherwise, we'll need to revert that change.