Added missing YOGA_EXPORT

Summary:
Added missing YOGA_EXPORT

#Changelog:
[Internal] [Fixed] - Added missing YOGA_EXPORT

Reviewed By: SidharthGuglani

Differential Revision: D18289071

fbshipit-source-id: a2e16a59427aa33b34b3d1fab9d1088904ee62f5

Author: Dmytro Kasianchuk

ReactCommon/yoga/yoga/Yoga.cpp

@@ -3645,7 +3645,7 @@ static inline bool YGMeasureModeNewMeasureSizeIsStricterAndStillValid(
       (lastComputedSize <= size || YGFloatsEqual(size, lastComputedSize));
 }
 
-float YGRoundValueToPixelGrid(
+YOGA_EXPORT float YGRoundValueToPixelGrid(
     const float value,
     const float pointScaleFactor,
     const bool forceCeil,
@@ -3696,7 +3696,7 @@ float YGRoundValueToPixelGrid(
       : scaledValue / pointScaleFactor;
 }
 
-bool YGNodeCanUseCachedMeasurement(
+YOGA_EXPORT bool YGNodeCanUseCachedMeasurement(
     const YGMeasureMode widthMode,
     const float width,
     const YGMeasureMode heightMode,