[Native][tests] Move golden data outside of Gradle build file

kotlin-native/backend.native/tests/serialization/serialized_default_args/library.kt

@@ -0,0 +1,10 @@
+/*
+ * 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.
+ */
+
+
+inline val Int.prop get() = SomeDataClass(second = this)
+
+data class SomeDataClass(val first: Int = 17, val second: Int = 19, val third: Int = 23)
+

kotlin-native/backend.native/tests/serialization/serialized_default_args/main.kt

@@ -0,0 +1,8 @@
+/*
+ * 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.
+ */
+
+fun main(args: Array<String>) {
+    println(666.prop)
+}

kotlin-native/backend.native/tests/serialization/serialized_default_args/main.out

@@ -0,0 +1 @@
+SomeDataClass(first=17, second=666, third=23)