python: Fixed hotspot symbol resolution in perf.data.

Previously hotspot incorrectly resolved symbols, mixing up them and making the performance analysis incorrect.

python/inet/test/profile.py

@@ -11,7 +11,7 @@
 def generate_profile_report(simulation_project=None, output_file="perf.data", **kwargs):
     if simulation_project is None:
         simulation_project = get_default_simulation_project()
-    simulation_task_results = run_simulations(simulation_project=simulation_project, mode="profile", prepend_args=["perf", "record", "-g", "-o", output_file], **kwargs)
+    simulation_task_results = run_simulations(simulation_project=simulation_project, mode="profile", prepend_args=["perf", "record", "-g", "--call-graph", "dwarf", "-o", output_file], **kwargs)
     working_directory = simulation_task_results.results[0].task.simulation_config.working_directory
     return simulation_project.get_relative_path(os.path.join(working_directory, output_file))