call margin method on child instead of node
call margin method on child instead of node

Summary: While moving a function as a method in YGNode, there was an error in which I mistakenly called a method on node, whereas I had to call it on child.

Reviewed By: emilsjolander

Differential Revision: D6918367

fbshipit-source-id: cee90e015f9e45a717a7307f59fd3b9ef6f399b6

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