message: add download location for mapfile.csv
diff: @@ -110,6 +110,7 @@ bool initPMUEventMap()
  if (!in.is_open())
  {
  cerr << "ERROR: File " << mapfile << " can't be open. \n";
  + cerr << " Download it from https://download.01.org/perfmon/mapfile.csv \n";
  return false;
  }
  int32 FMSPos = -1;
  