backend/tests: Add blackbox tests from Kotlin JVM

Added tests from testData/codegen/box directory. There are blackbox tests
in other directories and they are to be added.

backend.native/tests/external/codegen/blackbox/secondaryConstructors/callFromLocalSubClass.kt

@@ -0,0 +1,15 @@
+fun box(): String {
+    val z = "K"
+    open class A(val x: String) {
+        constructor() : this("O")
+
+        val y: String
+            get() = z
+    }
+
+    class B : A()
+
+    val b = B()
+
+    return b.x + b.y
+}