[Native][tests] Add standalone test for KClass package names

To ensure that after introducing `ReflectionPackageName` annotation,
we still have tests that check KClass package names without it.

compiler/testData/codegen/box/reflection/classLiterals/nativeWithoutPackagePatching.kt

@@ -0,0 +1,40 @@
+// TARGET_BACKEND: NATIVE
+// NATIVE_STANDALONE
+
+// Purpose of this test is to check that Kotlin/Native still generates correct
+// package names in reflection information without package patching.
+//
+// Native test engine by default groups tests to single compilation, and
+// renames packages to avoid clashes.
+// To make reflection-related tests work, it inserts ReflectionPackageName
+// annotations when patching, to instruct the compiler to use the original
+// package name for reflection information.
+//
+// The NATIVE_STANDALONE directive above disables test grouping.
+// So this test basically checks that without ReflectionPackageName the compiler
+// can still properly handle reflection information for classes and generates
+// correct package names.
+
+// FILE: pkg.kt
+package pkg
+
+class A
+
+// FILE: pkg.sub.kt
+package pkg.sub
+
+class B
+
+// FILE: defaut.kt
+import pkg.*
+import pkg.sub.*
+
+class C
+
+fun box(): String {
+    if (A::class.qualifiedName != "pkg.A") return "FAIL 1: ${A::class.qualifiedName}"
+    if (B::class.qualifiedName != "pkg.sub.B") return "FAIL 2: ${B::class.qualifiedName}"
+    if (C::class.qualifiedName != "C") return "FAIL 3: ${C::class.qualifiedName}"
+
+    return "OK"
+}