Check Windows case insensitive app name

On Windows if we run `node-debug app` and real file name is App.js,
we have two identical files in resources tree (app.js and App.js),
but we can't set breakpoints in App.js.
Maybe I don't understand this correctly. If this is converting `App.js` used by front-end to `app.js` used by Node runtime, then it should be implemented inside `convert.inspectorUrlToV8Name`, so that all places converting URLs will be fixed.