[KLIB tool] Update KLIB metadata dump tests

^KT-62340

native/native.tests/testData/klib/dump-metadata/builtinsSerializer/stringConcatenation.v2.txt

@@ -1,11 +1,35 @@
-package <root> {
-    // Signature: /Foo|null[0]
-    @Deprecated(message = "O/{id}") class Foo constructor()
-    // Signature: /Obj|null[0]
-    object Obj {
-        // Signature: /Obj.O|{}O[0]
-        const val O: String = "O"
-        // Signature: /Obj.concat|{}concat[0]
-        val concat: String = "OK"
+library {
+  // module name: <stringConcatenation.kt>
+
+  library fragment {
+    // package name: <root>
+
+    // class name: Foo
+    // class name: Obj
+
+    // signature: /Foo|null[0]
+    @kotlin/Deprecated(message = "O/{id}")
+    public final class Foo : kotlin/Any {
+
+      // signature: /Foo.<init>|<init>(){}[0]
+      public constructor()
     }
+
+    // signature: /Obj|null[0]
+    public final object Obj : kotlin/Any {
+
+      // signature: /Obj.<init>|<init>(){}[0]
+      private constructor()
+
+      // signature: /Obj.O|{}O[0]
+      public final const val O: kotlin/String /* = "O" */
+        // signature: /Obj.O.<get-O>|<get-O>(){}[0]
+        public final get
+
+      // signature: /Obj.concat|{}concat[0]
+      public final val concat: kotlin/String /* = "OK" */
+        // signature: /Obj.concat.<get-concat>|<get-concat>(){}[0]
+        public final get
+    }
+  }
 }