Moved trailing padding and border function as a method on YGNode

Summary: Moved trailing padding and border function as a method on YGNode

Reviewed By: emilsjolander

Differential Revision: D6899571

fbshipit-source-id: 7f686e8771d5a94aae502191516557b20c557d7c

yoga/YGNode.h

@@ -94,6 +94,9 @@ struct YGNode {
   float getLeadingPaddingAndBorder(
       const YGFlexDirection axis,
       const float widthSize);
+  float getTrailingPaddingAndBorder(
+      const YGFlexDirection axis,
+      const float widthSize);
   // Setters
 
   void setContext(void* context);