Fix file desc leak (#445)
Fix file desc leak (#445)

Summary:
The `fd` no close
Pull Request resolved: https://github.com/facebook/redex/pull/445

Reviewed By: agampe

Differential Revision: D19044153

Pulled By: justinjhendrick

fbshipit-source-id: 0524f452cdd044a47cf7b97414170fc99fd0e777

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex