Merge pull request #1346 from rajatchopra/releasev0.13.0-rc2

multi arch for release 13-rc2

Documentation/kube-flannel.yml

@@ -166,7 +166,7 @@ spec:
       serviceAccountName: flannel
       initContainers:
       - name: install-cni
-        image: quay.io/coreos/flannel:v0.13.0
+        image: quay.io/coreos/flannel:v0.13.0-rc2
         command:
         - cp
         args:
@@ -180,7 +180,7 @@ spec:
           mountPath: /etc/kube-flannel/
       containers:
       - name: kube-flannel
-        image: quay.io/coreos/flannel:v0.13.0
+        image: quay.io/coreos/flannel:v0.13.0-rc2
         command:
         - /opt/bin/flanneld
         args: