Include pointScaleFactor into the equality method of LayoutMetrics

Summary:
Previously the pointScaleFactor field was not being compared properly in LayoutMetrics equality method.
This diff fixes that

Reviewed By: shergin

Differential Revision: D15303555

fbshipit-source-id: 8863e9e1fbad15b43400afc32b97bf6d252cbe55

ReactCommon/fabric/core/layout/LayoutMetrics.h

@@ -45,7 +45,7 @@ struct LayoutMetrics {
                rhs.borderWidth,
                rhs.displayType,
                rhs.layoutDirection,
-               this->pointScaleFactor);
+               rhs.pointScaleFactor);
   }
 
   bool operator!=(const LayoutMetrics &rhs) const {