Minor, update reflection tests on stdlib

Since functionFromStdlibSingleFileFacade.kt was introduced, lazyOf was
also moved to a multifile class, so we're using another function to test
that reflection on a single file package facade from stdlib works

compiler/testData/codegen/box/reflection/methodsFromAny/functionFromStdlibSingleFileFacade.kt

@@ -7,8 +7,8 @@
 import kotlin.test.*
 
 fun box(): String {
-    val lazyOf: (String) -> Lazy<String> = ::lazyOf
-    assertEquals("fun lazyOf(T): kotlin.Lazy<T>", lazyOf.toString())
+    val hashCode = Any?::hashCode
+    assertEquals("fun kotlin.Any?.hashCode(): kotlin.Int", hashCode.toString())
 
     return "OK"
 }