gitlab: custom-runners: preserve more artifacts for debugging

Since custom runners are not generally available, make it possible to
debug the differences between a successful and a failing build by
comparing the logs and the build.ninja rules.

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

.gitlab-ci.d/custom-runners.yml

@@ -20,8 +20,10 @@ variables:
   artifacts:
     name: "$CI_JOB_NAME-$CI_COMMIT_REF_SLUG"
     expire_in: 7 days
+    when: always
     paths:
-      - build/meson-logs/testlog.txt
+      - build/build.ninja
+      - build/meson-logs
     reports:
       junit: build/meson-logs/testlog.junit.xml