title: Lexical or preprocessor issue in Xcode 8.0
body: <p>I'am using react native: 0.41.2, react: 15.4.2 and cocoapods for firebase(<a href="https://github.com/evollu/react-native-fcm" rel="nofollow noreferrer">https://github.com/evollu/react-native-fcm</a>).
  I have an issue while building the code. <strong>'React/RCTEventEmitter.h', 'React/RCTBridgeModule.h', 'React/RCTViewManager.h', 'React/RCTDefines.h'</strong> these files are not found error is throwing while running the project.</p>
  
  <p>But these files are already in my project by clicking ctrl with that file name. <a href="https://i.stack.imgur.com/hcnGm.png" rel="nofollow noreferrer">Image</a></p>
  
  <p>podfile:</p>
  
  <pre><code># Uncomment the next line to define a global platform for your project
  # platform :ios, '9.0'
  source 'https://github.com/CocoaPods/Specs.git'
  
  target 'Inspector' do
    # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
    # use_frameworks!
  
    # Pods for Inspector
    react_native_path = "../node_modules/react-native"
    pod "React", :path =&gt; react_native_path, :subspecs =&gt; [
      'Core',
      'RCTActionSheet',
      'RCTAnimation',
      'RCTGeolocation',
      'RCTImage',
      'RCTLinkingIOS',
      'RCTNetwork',
      'RCTSettings',
      'RCTText',
      'RCTVibration',
      'RCTWebSocket'
    ]
    pod 'Firebase/Core'
    pod 'Firebase/Messaging'
    target 'Inspector-tvOSTests' do
      inherit! :search_paths
      pod 'Firebase/Messaging'
      # Pods for testing
    end
  
    target 'InspectorTests' do
      inherit! :search_paths
      pod 'Firebase/Messaging'
      # Pods for testing
    end
  
  end
  </code></pre>