automation/cirrus-ci: store XTF and Xen build artifacts

In preparation for adding some smoke tests that will consume those outputs.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

.cirrus.yml

@@ -61,6 +61,14 @@ task:
   build_script:
     - gmake -j`sysctl -n hw.ncpu` clang=y
 
+  xen_artifacts:
+    path: xen/xen
+    type: application/octet-stream
+
+  debug_artifacts:
+    path: xen/xen-syms
+    type: application/octet-stream
+
 task:
   name: 'FreeBSD: randconfig build'
 
@@ -106,3 +114,7 @@ task:
     - cc --version
     - git rev-parse HEAD
     - gmake -j`sysctl -n hw.ncpu` LLVM=y
+
+  xtf_artifacts:
+    path: xtf/tests/selftest/test-*-selftest
+    type: application/octet-stream