Ensure the @@species protector is updated for accessors

test/mjsunit/harmony/array-species-constructor-accessor.js

Index: test/mjsunit/harmony/array-species-constructor-accessor.js
diff --git a/test/mjsunit/harmony/array-species-constructor.js b/test/mjsunit/harmony/array-species-constructor-accessor.js
similarity index 92%
copy from test/mjsunit/harmony/array-species-constructor.js
copy to test/mjsunit/harmony/array-species-constructor-accessor.js
index d4eeefa010bd987ce960a982d3c2b3604049a266..5985e5308b9d70d6f80137f3ff84a5f315a71d3c 100644
--- a/test/mjsunit/harmony/array-species-constructor.js
+++ b/test/mjsunit/harmony/array-species-constructor-accessor.js
@@ -17,7 +17,7 @@ assertEquals(1, x.concat([1])[0]);
 
 class MyArray extends Array { }
 
-x.constructor = MyArray;
+Object.defineProperty(x, 'constructor', {get() { return MyArray; }});
 
 assertEquals(MyArray, x.map(()=>{}).constructor);
 assertEquals(MyArray, x.filter(()=>{}).constructor);