Introduce VCArray.clone in scala.

It can be done with non-abstract rhs of method.

Author: DarkDimius

src/dotty/runtime/vc/VCArrayClone.java

@@ -4,8 +4,9 @@ abstract class VCPrototype {
 }
 
 
-abstract class VCArrayPrototype[T <: VCPrototype] extends Object with Cloneable with VCArrayClone {
+abstract class VCArrayPrototype[T <: VCPrototype] extends Object with Cloneable {
   def apply(idx: Int): Object
   def update(idx: Int, el: T): Unit
   def length: Int
+  override def clone: Object = super.clone()
 }