bench test updates

scripts/serial_scenario.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+"""Run JSON-described serial bench scenarios."""
+
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+from h8536.serial_scenario import main
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())