Serialize descriptors for local/anonymous classes on JVM

Reflection needs this information to work for local classes and anonymous
objects

compiler/testData/serialization/local/simpleInMemberFunction.kt

@@ -0,0 +1,7 @@
+// CLASS_NAME_SUFFIX: A$foo$Local
+
+class A {
+    fun foo() {
+        class Local
+    }
+}