Fix substition of inner classes constructors

It should have substituted class as containing declaration

compiler/backend/src/org/jetbrains/kotlin/codegen/AccessorForConstructorDescriptor.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.TypeSubstitutor
 
 public class AccessorForConstructorDescriptor(
         private val calleeDescriptor: ConstructorDescriptor,
@@ -38,6 +39,8 @@ public class AccessorForConstructorDescriptor(
 
     override fun getSuperCallTarget(): ClassDescriptor? = superCallTarget
 
+    override fun substitute(substitutor: TypeSubstitutor) = super.substitute(substitutor) as ConstructorDescriptor
+
     init {
         initialize(
                 DescriptorUtils.getReceiverParameterType(extensionReceiverParameter),