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/reflection/properties/privateJvmStaticVarInObject.kt

@@ -0,0 +1,30 @@
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+
+import kotlin.reflect.*
+import kotlin.reflect.jvm.*
+
+object Obj {
+    @JvmStatic
+    private var result: String = "Fail"
+}
+
+fun box(): String {
+    val p = Obj::class.members.single { it.name == "result" } as KMutableProperty1<Any?, String>
+    p.isAccessible = true
+
+    try {
+        p.set(null, "OK")
+        return "Fail: set should check that first argument is Obj"
+    } catch (e: IllegalArgumentException) {}
+
+    try {
+        p.get(null)
+        return "Fail: get should check that first argument is Obj"
+    } catch (e: IllegalArgumentException) {}
+
+    p.set(Obj, "OK")
+    return p.get(Obj)
+}