`make vscode-project` doesn't seem to work anymore after the winenv re-write. When opening the workspace in vscode it shows orange exclamation marks next to the 'Source root' and 'Build artifacts' folders, and I can't browse anything.

The problem seems to be that the new script produces paths with `\` in it, where it before produced paths with `/`, in the emitted jdk.code-workspace file. Both of these work for vscode, but the former needs to be quoted `\\`.

If I manually replace the `\` with `/ `or `\\` in that file it works.