[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/function/defaultsWithInlineClasses.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// WITH_STDLIB
+
+import kotlin.test.*
+
+inline class Foo(val value: Int)
+fun foo(x: Foo = Foo(42)) = x.value
+
+fun box(): String {
+    assertEquals(foo(), 42)
+    assertEquals(foo(Foo(17)), 17)
+
+    return "OK"
+}