Use correct build config target for litho
Use correct build config target for litho

Summary: Per title, we shouldn't hardcode the target

Reviewed By: passy

Differential Revision: D5964657

fbshipit-source-id: 7406dbde258db5c8c449d9132b38de7f07da46e4

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