Unbreak build of ScopeGuard example
Unbreak build of ScopeGuard example

Summary: This file's build was broken.

Reviewed By: Gownta

Differential Revision: D39472293

fbshipit-source-id: 40571ef08f9367ff3a61873f850edcb56ad525b2

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly