Move built-ins from package "jet" to "kotlin"

#KT-2896 Fixed

core/builtins/native/kotlin/Any.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public open class Any {
     public open fun equals(other: Any?): Boolean

core/builtins/native/kotlin/Arrays.kt

@@ -1,8 +1,8 @@
-package jet
+package kotlin
 
 public fun arrayOfNulls<T>(size : Int) : Array<T?>
 
-public class Array<reified T>(public val size : Int, init : (Int) -> T) {
+public class Array<reified T>(public val size : Int, init : Function1<Int, T>) {
   public fun get(index : Int) : T
   public fun set(index : Int, value : T) : Unit
 

core/builtins/native/kotlin/Char.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public class Char private () : Comparable<Char> {
     public fun compareTo(other : Double) : Int

core/builtins/native/kotlin/Collections.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public trait Iterable<out T> {
     public fun iterator() : Iterator<T>
@@ -146,4 +146,4 @@ public trait MutableMap<K, V> : Map<K, V> {
     public trait MutableEntry<K,V> : Map.Entry<K, V> {
     	public fun setValue(value : V) : V
     }
-}
+}

core/builtins/native/kotlin/Enum.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public abstract class Enum<E: Enum<E>>(name: String, ordinal: Int) {
   public final fun name()    : String

core/builtins/native/kotlin/Iterator.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public trait Iterator<out T> {
     public fun next(): T

core/builtins/native/kotlin/Library.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public trait Annotation
 

core/builtins/native/kotlin/Nothing.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 /**
  * Nothing has no instances

core/builtins/native/kotlin/Numbers.kt

@@ -1,4 +1,4 @@
-package jet
+package kotlin
 
 public abstract class Number {
   public abstract fun toDouble() : Double