Support mapping between Java and Kotlin reflection objects

compiler/testData/codegen/boxWithStdlib/reflection/mapping/topLevelProperty.kt

@@ -0,0 +1,23 @@
+import kotlin.reflect.jvm.*
+import kotlin.test.assertEquals
+
+var topLevel = "123"
+
+fun box(): String {
+    val p = ::topLevel
+
+    // TODO: uncomment when fields are loaded from package parts
+    // assert(p.javaField != null, "Fail p field")
+
+    val getter = p.javaGetter!!
+    val setter = p.javaSetter!!
+
+    assertEquals(getter, Class.forName("_DefaultPackage").getMethod("getTopLevel"))
+    assertEquals(setter, Class.forName("_DefaultPackage").getMethod("setTopLevel", javaClass<String>()))
+
+    assert(getter.invoke(null) == "123", "Fail k getter")
+    setter.invoke(null, "456")
+    assert(getter.invoke(null) == "456", "Fail k setter")
+
+    return "OK"
+}