Filter out invisible fakes in KClass.properties

A user will rarely need those at the moment, and there's currently no other way
to let him filter out them by himself

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

@@ -0,0 +1,6 @@
+open class A(private val p: Int)
+class B : A(42)
+
+fun box() =
+        if (B::class.properties.isEmpty()) "OK"
+        else "Fail: invisible fake overrides should not appear in KClass.properties"

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -2890,6 +2890,12 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
                 doTestWithStdlib(fileName);
             }
 
+            @TestMetadata("privateFakeOverrideFromSuperclass.kt")
+            public void testPrivateFakeOverrideFromSuperclass() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/reflection/properties/privateFakeOverrideFromSuperclass.kt");
+                doTestWithStdlib(fileName);
+            }
+
             @TestMetadata("simpleGetProperties.kt")
             public void testSimpleGetProperties() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/reflection/properties/simpleGetProperties.kt");

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt

@@ -17,6 +17,7 @@
 package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
+import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.resolve.scopes.JetScope
 import org.jetbrains.kotlin.serialization.deserialization.findClassAcrossModuleDependencies
 import kotlin.reflect.*
@@ -66,7 +67,8 @@ class KClassImpl<T>(override val jClass: Class<T>) : KCallableContainerImpl(), K
                     .filterIsInstance<PropertyDescriptor>()
                     .filter { descriptor ->
                         (descriptor.getExtensionReceiverParameter() != null) == extension &&
-                        (descriptor.getKind().isReal() || !declared)
+                        (descriptor.getKind().isReal() || !declared) &&
+                        descriptor.getVisibility() != Visibilities.INVISIBLE_FAKE
                     }
                     .map(create)
                     .toList()