Add 'val KClass.declaredProperties', make getProperties a property

compiler/testData/codegen/boxWithStdlib/reflection/properties/fakeOverridesInSubclass.kt

@@ -1,4 +1,5 @@
 import kotlin.reflect.jvm.*
+import kotlin.reflect.*
 import kotlin.test.*
 
 open class Super(val r: String)
@@ -6,7 +7,10 @@ open class Super(val r: String)
 class Sub(r: String) : Super(r)
 
 fun box(): String {
-    val props = javaClass<Sub>().kotlin.getProperties()
-    assertEquals(listOf("r"), props.map { it.name })
-    return props.single().get(Sub("OK")).toString()
+    val props = javaClass<Sub>().kotlin.declaredProperties
+    if (!props.isEmpty()) return "Fail $props"
+
+    val allProps = javaClass<Sub>().kotlin.properties
+    assertEquals(listOf("r"), allProps.map { it.name })
+    return allProps.single().get(Sub("OK")) as String
 }