Annotate companion object declaration with SinceKotlin

Move it to the end of the class declaration.
Update builtins testdata

compiler/testData/builtin-classes/default/kotlin.txt

@@ -39,6 +39,10 @@ public final class Boolean : kotlin.Comparable<kotlin.Boolean> {
     public final operator fun not(): kotlin.Boolean
     public final infix fun or(/*0*/ other: kotlin.Boolean): kotlin.Boolean
     public final infix fun xor(/*0*/ other: kotlin.Boolean): kotlin.Boolean
+
+    @kotlin.SinceKotlin(version = "1.3") public companion object Companion {
+        /*primary*/ private constructor Companion()
+    }
 }
 
 public final class BooleanArray {

compiler/testData/builtin-classes/java6/kotlin.txt

@@ -40,6 +40,10 @@ public final class Boolean : kotlin.Comparable<kotlin.Boolean>, java.io.Serializ
     public final operator fun not(): kotlin.Boolean
     public final infix fun or(/*0*/ other: kotlin.Boolean): kotlin.Boolean
     public final infix fun xor(/*0*/ other: kotlin.Boolean): kotlin.Boolean
+
+    @kotlin.SinceKotlin(version = "1.3") public companion object Companion {
+        /*primary*/ private constructor Companion()
+    }
 }
 
 public final class BooleanArray : kotlin.Any, kotlin.Cloneable, java.io.Serializable {

compiler/testData/builtin-classes/java8/kotlin.txt

@@ -40,6 +40,10 @@ public final class Boolean : kotlin.Comparable<kotlin.Boolean>, java.io.Serializ
     public final operator fun not(): kotlin.Boolean
     public final infix fun or(/*0*/ other: kotlin.Boolean): kotlin.Boolean
     public final infix fun xor(/*0*/ other: kotlin.Boolean): kotlin.Boolean
+
+    @kotlin.SinceKotlin(version = "1.3") public companion object Companion {
+        /*primary*/ private constructor Companion()
+    }
 }
 
 public final class BooleanArray : kotlin.Any, kotlin.Cloneable, java.io.Serializable {

compiler/testData/builtin-classes/newMethods/kotlin.txt

@@ -40,6 +40,10 @@ public final class Boolean : kotlin.Comparable<kotlin.Boolean>, java.io.Serializ
     public final operator fun not(): kotlin.Boolean
     public final infix fun or(/*0*/ other: kotlin.Boolean): kotlin.Boolean
     public final infix fun xor(/*0*/ other: kotlin.Boolean): kotlin.Boolean
+
+    @kotlin.SinceKotlin(version = "1.3") public companion object Companion {
+        /*primary*/ private constructor Companion()
+    }
 }
 
 public final class BooleanArray : kotlin.Any, kotlin.Cloneable, java.io.Serializable {

core/builtins/native/kotlin/Boolean.kt

@@ -21,8 +21,6 @@ package kotlin
  * represented as values of the primitive type `boolean`.
  */
 public class Boolean private constructor() : Comparable<Boolean> {
-    companion object {}
-
     /**
      * Returns the inverse of this boolean.
      */
@@ -46,4 +44,7 @@ public class Boolean private constructor() : Comparable<Boolean> {
     public infix fun xor(other: Boolean): Boolean
 
     public override fun compareTo(other: Boolean): Int
+
+    @SinceKotlin("1.3")
+    companion object {}
 }