Add Kubernetes 1.12.0 to VHD image (#3942)

packer/install-dependencies.sh

@@ -118,7 +118,7 @@ done
 pullContainerImage "docker" "busybox"
 
 # TODO: fetch supported k8s versions from an acs-engine command instead of hardcoding them here
-K8S_VERSIONS="1.7.15 1.7.16 1.8.14 1.8.15 1.9.10 1.9.11 1.10.7 1.10.8 1.11.2 1.11.3"
+K8S_VERSIONS="1.7.15 1.7.16 1.8.14 1.8.15 1.9.10 1.9.11 1.10.7 1.10.8 1.11.2 1.11.3 1.12.0"
 
 for KUBERNETES_VERSION in ${K8S_VERSIONS}; do
     HYPERKUBE_URL="k8s.gcr.io/hyperkube-amd64:v${KUBERNETES_VERSION}"