ci/linux: store the test logs as artifacts on failure

This makes debugging a lot easier than having to reproduce locally.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

.github/workflows/linux.yml

@@ -41,3 +41,10 @@ jobs:
       - name: Test with valgrind
         run:
           meson test -C build --print-errorlogs --setup=valgrind --no-suite python-tests
+      - name: Upload test logs
+        uses: actions/upload-artifact@v3
+        if: failure()
+        with:
+          name: test logs
+          path: |
+            build/meson-logs/