Add necessary method for bootstrapped compilation

Author: Antoine Brunner

library/src/scala/runtime/DynamicTuple.scala

@@ -6,6 +6,24 @@ object DynamicTuple {
   inline val MaxSpecialized = 22
   inline private val XXL = MaxSpecialized + 1
 
+  def to$Array(xs: Tuple, n: Int) = {
+    val arr = new Array[Object](n)
+    var i = 0
+    var it = xs.asInstanceOf[Product].productIterator
+    while (i < n) {
+      arr(i) = it.next().asInstanceOf[Object]
+      i += 1
+    }
+    arr
+  }
+
+  def cons$Array[H](x: H, elems: Array[Object]): Array[Object] = {
+    val elems1 = new Array[Object](elems.length + 1)
+    elems1(0) = x.asInstanceOf[Object]
+    System.arraycopy(elems, 0, elems1, 1, elems.length)
+    elems1
+  }
+
   def dynamicToArray(self: Tuple): Array[Object] = (self: Any) match {
     case self: Unit => Array.emptyObjectArray
     case self: TupleXXL => self.toArray