Fix permissions on publish script
Fix permissions on publish script

Summary:
autosparse ruined the fun and didn't include the mode change in the previous
export. This is turning Circle red.

Reviewed By: IanChilds

Differential Revision: D5019655

fbshipit-source-id: 34591fb42b59a9681e3f1e0a07f5b1393706f712

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho