[FIX]: gog setup regression for v1 games

[imLinguin]

On Linux we were looking at the windows version of the path which was always false.

Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[CommandMC]

I always have a hard time testing these without an explicit "These games were affected by this issue" list, but I'm gonna assume you know what you're doing

[imLinguin]

We were doing a getWinePath for win variant on this variable. So we were trying to check if C:/ paths exist... on Linux. I guess it doesn't need explanation in certain games