Add support to cros_vm_lib.sh to mount the disk as a virtio-scsi device.

This CL adds a flag that changes the device type to a virtio-scsi disk.
To build an image that works with scsi:

USE=gce ./build_packages, etc

BUG=chromium:391105
TEST=Tested with/without scsi set.

Change-Id: I43301b7aaa2cfa42faa2e80eb567315ae8b48dd4
Reviewed-on: https://chromium-review.googlesource.com/206583
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Olof Johansson <olofj@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Chris Sosa <sosa@chromium.org>
1 file changed