Add missing dependency to :litho-widget (#491)
Add missing dependency to :litho-widget (#491)

Summary:
Caused `:litho-sections-debug` to fail building.
Pull Request resolved: https://github.com/facebook/litho/pull/491

Differential Revision: D14066055

Pulled By: mihaelao

fbshipit-source-id: 1669cd8f4bc7aacd82e6d1920d746536dde73f9e

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