Support KCallable.call

#KT-2187 Fixed

compiler/testData/codegen/boxWithStdlib/reflection/call/privateProperty.kt

@@ -0,0 +1,17 @@
+import kotlin.reflect.*
+import kotlin.reflect.jvm.*
+import kotlin.test.*
+
+class A(private var result: String)
+
+fun box(): String {
+    val a = A("abc")
+
+    val p = A::class.declaredProperties.single() as KMutableProperty1<A, String>
+    p.accessible = true
+    assertEquals("abc", p.call(a))
+    assertEquals(Unit, p.setter.call(a, "def"))
+    assertEquals("def", p.getter.call(a))
+
+    return "OK"
+}