Add something like -e to only dump the main exe for the game

[leem919]

The files for GDK games can be modded without dumping them, except for the exe. To mod Hi-Fi Rush, I had to dump the whole game, which is pretty big and took a little while, and all I needed was the exe so I could patch it. After that, I just renamed the existing exe in the original game files and copied in the patched one and the mods I added worked fine from there.