Add missing swift/objc headers

Summary: Per title

Reviewed By: danielbuechele

Differential Revision: D15199200

fbshipit-source-id: a4251311d7fd2d22d39ba89ba0052514abbc3e2c

iOS/FlipperKit/FlipperDiagnosticsViewController.m

@@ -1,3 +1,10 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
 #ifdef FB_SONARKIT_ENABLED
 
 #import "FlipperDiagnosticsViewController.h"

iOS/FlipperKit/SKEnvironmentVariables.m

@@ -1,3 +1,10 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
 #ifdef FB_SONARKIT_ENABLED
 
 #import "SKEnvironmentVariables.h"

iOS/FlipperKit/SKStateUpdateCPPWrapper.h

@@ -1,3 +1,9 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the LICENSE
+ * file in the root directory of this source tree.
+ */
 #ifdef FB_SONARKIT_ENABLED
 
 #include <Flipper/FlipperStateUpdateListener.h>

iOS/FlipperKit/SKStateUpdateCPPWrapper.mm

@@ -1,3 +1,11 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+
 #ifdef FB_SONARKIT_ENABLED
 
 #include "SKStateUpdateCPPWrapper.h"

iOS/Plugins/FlipperKitUserDefaultsPlugin/FKUserDefaultsSwizzleUtility.m

@@ -3,6 +3,8 @@
 //  FlipperKit
 //
 //  Created by Marc Terns on 10/6/18.
+//  Copyright (c) 2018-present, Facebook, Inc.
+//  Copyright (c) 2018-present, Facebook, Inc.
 //
 
 #import "FKUserDefaultsSwizzleUtility.h"

iOS/SampleSwift/SampleSwift/UserDefaultsViewController.swift

@@ -4,6 +4,7 @@
 //
 //  Created by Marc Terns on 10/7/18.
 //  Copyright © 2018 Noah Gilmore. All rights reserved.
+//  Copyright (c) 2018-present, Facebook, Inc.
 //
 
 import UIKit