Made vararg parameters have Array<out T> type

instead of simply Array<T>
  #KT-1638 Fixed
  #KT-2163 Fixed
  #KT-3213 Fixed
  #KT-4172 Fixed
  #KT-5534 Fixed

compiler/testData/diagnostics/testsWithStdLib/varargs/kt4172j.kt

@@ -0,0 +1,9 @@
+// FILE: A.java
+public class A {
+    public static void main(String[] args) {}
+}
+
+// FILE: 1.kt
+fun main(args: Array<String>) {
+    A.main(array())
+}