but it should be /dev/sda.
Change-Id: I9764fe2a06cf47e8c0daf38df41c288c280bd6f7
This commit adds the cloud-initramfs-growroot package to the installation list for GCE images with backports enabled, and updates the gce tasklist to add the /etc/init.d/expand-root script (with provider-appropriate touch-ups) to the image.