added a library
added a library

Summary: Pull Request resolved: https://github.com/facebook/litho/pull/513

Differential Revision: D14403770

Pulled By: passy

fbshipit-source-id: bdbc97169e1e134178043b34121030646055c4b4

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