Add a test for referencing classes using fqnames.

js/js.translator/testFiles/multiNamespace/cases/createClassFromOtherNamespaceUsingImport/a.kt

@@ -0,0 +1,5 @@
+package a.foo
+
+import b.foo.*
+
+fun box() = (A().tadada(A()))

js/js.translator/testFiles/multiNamespace/cases/createClassFromOtherNamespaceUsingImport/b.kt

@@ -0,0 +1,5 @@
+package b.foo
+
+class A() {
+  fun tadada(a : A) = true
+}