- InnerClasses & EnclosingMethod attributes for local classes

in multifile part members
- invocation of multifile part/facade members
(TODO: deserialized descriptor case)
- inlining of multifile part/facade members
(TODO: inline against binaries case)

compiler/testData/codegen/boxWithJava/fileClasses/multifileClassWithCrossCall/Baz.java

@@ -0,0 +1,5 @@
+public class Baz {
+    public static String baz() {
+        return Util.foo() + Util.bar();
+    }
+}