Use Py_GCC_ATTRIBUTE(unused) for stop_tracing label

Author: clin1234

Tools/cases_generator/tier1_generator.py

@@ -203,6 +203,8 @@ def generate_tier1_labels(
     emitter.emit("\n")
     # Emit tail-callable labels as function defintions
     for name, label in analysis.labels.items():
+        if name == 'stop_tracing':
+            emitter.emit("Py_GCC_ATTRIBUTE((unused)) \n")
         emitter.emit(f"LABEL({name})\n")
         storage = Storage(Stack(), [], [], 0, False)
         if label.spilled: