Fix for KT-3335: Creating imported super class' inner class fails in codegen

#KT-3335 Fixed

compiler/testData/codegen/box/classes/inner/properOuter.kt

@@ -0,0 +1,16 @@
+
+open class A(val s: String) {
+    open inner class B(val s: String) {
+        fun testB() = s + this@A.s
+    }
+
+    open inner class C(): A("C") {
+        fun testC() =
+                B("B_").testB()
+    }
+}
+
+fun box(): String {
+    val res = A("A").C().testC()
+    return if (res == "B_C") "OK" else res;
+}