Include package part name to top level closure names

#KT-4234 Fixed
 #KT-4496 Fixed

compiler/testData/codegen/boxWithStdlib/reflection/enclosing/localClassInTopLevelFunction.kt

@@ -0,0 +1,10 @@
+// KT-4234
+
+fun box(): String {
+    class C
+
+    val name = javaClass<C>().getSimpleName()
+    if (name != "box\$C") return "Fail: $name"
+
+    return "OK"
+}