Add Xen Guest Images tarball
- xen_guest_image is a tarball that includes a minimal and tiny Xen guest Kernel/rootfs images to run a smoke test.
- Include Xen images in testing if
ENABLE_XENis true.
Signed-off-by: Javier Tia javier.tia@linaro.org
ENABLE_XEN is true.Signed-off-by: Javier Tia javier.tia@linaro.org