Support for simple cases when a namespace creates classes from other namespaces.

js/js.translator/testFiles/namespace/cases/classCreatedInDeeplyNestedNamespace.kt

@@ -0,0 +1,7 @@
+package foo1.foo2.foo3.foo5.foo6.foo7.foo8
+
+fun box() = A().doBox()
+
+class A() {
+  fun doBox() = true
+}