Support WoW64 path conversion

[Tyriar]

When running 32-bit VS Code on 64-bit Windows the path needs to be sysnative. Basically we want to do this:

https://github.com/Microsoft/vscode/blob/c93565448ab9988cbeb8a0eac4e3304dc97cc844/src/vs/workbench/parts/terminal/electron-browser/terminalConfigHelper.ts#L214-L222

Context: #27

[jabalv]

#41 should solve this!