Add hasErrata(), addErrata(), removeErrata()

Summary:
X-link: https://github.com/facebook/react-native/pull/37375

Adds internal helpers to YGConfig to make bit manipulation more readable. We also expose `hasErrata()` to YGNode beacuse checking that will be a common pattern. We intentionally don't add mutating functions to the node, since current model is to inval a node on commiting whole config.

This is not exposed via the C ABI.

Reviewed By: yungsters

Differential Revision: D45765971

fbshipit-source-id: eadaee4b9cf5204ac4984ecc52cc08650d144a30

yoga/YGConfig.h

@@ -67,7 +67,10 @@ struct YOGA_EXPORT YGConfig {
   facebook::yoga::ExperimentalFeatureSet getEnabledExperiments() const;
 
   void setErrata(YGErrata errata);
+  void addErrata(YGErrata errata);
+  void removeErrata(YGErrata errata);
   YGErrata getErrata() const;
+  bool hasErrata(YGErrata errata) const;
 
   void setPointScaleFactor(float pointScaleFactor);
   float getPointScaleFactor() const;