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");