recursiveModuleCompileToSingleFile: chdir on reject

Make `process.chdir` to original dir if compilation if failed. For success result chdir revert already exists.

It need it you need to execute other scripts after traceur compilation. And if it is failed - dir should be changed to original.
Of Course same way should be used at both places. My bad. Just tired at end of the day :crying_cat_face: 
Already fixed.