Serialize descriptors for local/anonymous classes on JVM

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

compiler/testData/serialization/local/annotationsInLocalClass.kt

@@ -0,0 +1,14 @@
+// CLASS_NAME_SUFFIX: A$foo$Local
+
+class A {
+    annotation class Ann(val info: String)
+
+    fun foo() {
+        [Ann("class")] class Local {
+            Ann("fun") fun foo(): Local = this
+            Ann("val") val x = foo()
+
+            Ann("inner") inner class Inner
+        }
+    }
+}