Imported bugfix from facebook/react/pull/14940

Author: Brian Vaughn

src/backend/ReactDebugHooks.js

@@ -87,6 +87,10 @@ function readContext<T>(
 }
 
 function useContext<T>(context: any, observedBits: void | number | boolean): T {
+  if (__DEV__) {
+    // ReactFiberHooks only adds context to the hooks list in DEV.
+    nextHook();
+  }
   hookLog.push({
     primitive: 'Context',
     stackError: new Error(),