fix checksum for rootfs in vagrant
fix checksum for rootfs in vagrant

shashidharatd/garden-linux,shashidharatd/garden-linux,cloudfoundry-incubator/garden-linux,tangfeixiong/garden,cloudfoundry-incubator/garden-linux,tsaleh/garden,cloudfoundry-incubator/garden-linux,tsaleh/garden,savaki/garden,cloudfoundry-incubator/garden,shashidharatd/garden-linux,cloudfoundry-incubator/garden,savaki/garden,shashidharatd/garden-linux,tangfeixiong/garden