update the Core fake layout for testing
update the Core fake layout for testing

Summary: There is a golden image of the `Core` layout so that tests will catch accidental increases of the `Core` size. Updated it to the latest `Core` layout.

Differential Revision: D29251632

fbshipit-source-id: d16086390548848f4302678e0b86d9841be1140b

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