Fix generated set trap for proxy cases, again

Somehow I checked in a typo into most of the code paths.

Author: domenic

lib/output/utils.js

@@ -161,10 +161,10 @@ function ordinarySetWithOwnDescriptor(target, property, value, receiver, ownDesc
         return false;
       }
       const valueDesc = { value };
-      return Reflect.defineOwnProperty(receiver, property, valueDesc);
+      return Reflect.defineProperty(receiver, property, valueDesc);
     }
 
-    return Reflect.defineOwnProperty(
+    return Reflect.defineProperty(
       receiver,
       property,
       { value, writable: true, enumerable: true, configurable: true }