[Mac] Cannot jump to the stacktrace's source correctly when the project directory contains chinese characters

<img width="1100" alt="screen shot 2018-04-12 at 4 40 34 pm" src="https://user-images.githubusercontent.com/14052197/38666279-1b184868-3e71-11e8-83a6-36d16be5416e.png">

The chinese path returned by debugger contains messy code, so it failed to jump to the source editor.