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

^KT-65979

compiler/testData/codegen/box/function/defaults4.kt

@@ -0,0 +1,27 @@
+/*
+ * 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.
+ */
+// JVM_ABI_K1_K2_DIFF: KT-63864
+// WITH_STDLIB
+
+import kotlin.test.*
+
+val sb = StringBuilder()
+
+open class A {
+    open fun foo(x: Int = 42) = sb.append(x)
+}
+
+open class B : A()
+
+class C : B() {
+    override fun foo(x: Int) = sb.append(x + 1)
+}
+
+fun box(): String {
+    C().foo()
+
+    assertEquals("43", sb.toString())
+    return "OK"
+}