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

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

@@ -0,0 +1,23 @@
+import kotlin.reflect.*
+import kotlin.test.*
+
+open class Super {
+    val a: Int = 1
+    val String.b: String get() = this
+}
+
+class Sub : Super() {
+    val c: Double = 1.0
+    val Char.d: Char get() = this
+}
+
+fun box(): String {
+    val sub = Sub::class
+
+    assertEquals(listOf("a", "c"), sub.properties.map { it.name }.sort())
+    assertEquals(listOf("b", "d"), sub.extensionProperties.map { it.name }.sort())
+    assertEquals(listOf("c"), sub.declaredProperties.map { it.name })
+    assertEquals(listOf("d"), sub.declaredExtensionProperties.map { it.name })
+
+    return "OK"
+}