automation: make available the tests artifacts to the pipeline

In order to make available the pre-built binaries of the
automation/tests-artifacts containers to the gitlab-ci pipeline we need
to export them as gitlab artifacts.

To do that, we create two "fake" jobs that simply export the require
binaries as artifacts and do nothing else.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Acked-by: Wei Liu <wl@xen.org>

automation/gitlab-ci/build.yaml

@@ -468,3 +468,29 @@ alpine-3.12-gcc-debug-arm64:
   extends: .gcc-arm64-build-debug
   variables:
     CONTAINER: alpine:3.12-arm64v8
+
+
+# Arm test artifacts
+
+alpine-3.12-arm64-rootfs-export:
+  stage: build
+  image: registry.gitlab.com/xen-project/xen/tests-artifacts/alpine:3.12-arm64v8
+  script:
+    - mkdir binaries && cp /initrd.tar.gz binaries/initrd.tar.gz
+  artifacts:
+    paths:
+      - binaries/initrd.tar.gz
+  tags:
+    - arm64
+
+kernel-5.9.9-arm64-export:
+  stage: build
+  image: registry.gitlab.com/xen-project/xen/tests-artifacts/kernel:5.9.9-arm64v8
+  script:
+    - mkdir binaries && cp /Image binaries/Image
+  artifacts:
+    paths:
+      - binaries/Image
+  tags:
+    - arm64
+