It is the same as the existing ARM64 alpine 3.12 test-artifact. It is
used to export an Alpine rootfs for Dom0 used for testing.
Also add the exporting job to build.yaml so that the binaries can be
used during gitlab-ci runs.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
