[Ch 9, 10] Save log files to different folder than save files to avoid using up steam cloud file count

[drojf]

Chapters 9 and 10 save log files to the same place as save files. As per #111, steam cloud has a file limit, which varies per chapter.

To avoid using up the file limit, log files should be placed in a different folder than the save files.

Note that we have two different save files, the save files which are generated by the game (Player.log and Player-prev.log), and the mod log files which we added to debug the layer error issue (mod_log_1.txt, mod_log_2.txt). Both should not be put in the steam cloud folder.