tests: Update box tests (1050294:id)

backend.native/tests/external/codegen/box/dataClasses/copy/withSecondaryConstructor.kt

@@ -0,0 +1,9 @@
+data class A(val o: String, val k: String) {
+    constructor() : this("O", "k")
+}
+
+fun box(): String {
+    val a = A().copy(k = "K")
+    return a.o + a.k
+}
+