title: Flutter plugin `geolocator-Swift.h` file not found
body: <p>I have created a small Flutter plugin which can be used to monitor location changes in you Flutter application (source: <a href="https://github.com/baseflowit/flutter-geolocator" rel="noreferrer">https://github.com/baseflowit/flutter-geolocator</a>). After extensive testing using the example project that is part of the project structure (as generated by the Flutter CLI) we decided to publish the plugin to make it available to the world.</p>
  
  <p>Now we received some feedback that when you include the package from the online Dart Packages repo into your Flutter App, the iOS version doesn't compile and returns the following exception:</p>
  
  <pre><code>/Users/maurits/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/geolocator-0.0.2/ios/Classes/GeolocatorPlugin.m:2:9:
  fatal error: 'geolocator/geolocator-Swift.h' file not found
  </code></pre>
  
  <p>This error occurs when running the Flutter App in debug mode, but also when making a iOS package using <code>flutter build ios --release</code>. </p>
  
  <p>I am a bit lost where this error comes from since the <code>example</code> app that is part of the <code>Geolocator</code> project works without any problems. I know the <code>geolocator/geolocator-Swift.h</code> file is autogenerated, so to me it looks like that the file doesn't end up in the final Dart Package. To run the final Dart Package I ran the following command:</p>
  
  <p><code>flutter packages pub publish</code></p>
  
  <p>Here is the output of <code>flutter doctor -v</code>:</p>
  
  <pre><code>[✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.5 17F77, locale en-NL)
      • Flutter version 0.5.1 at /Users/maurits/Developer/flutter
      • Framework revision c7ea3ca377 (4 weeks ago), 2018-05-29 21:07:33 +0200
      • Engine revision 1ed25ca7b7
      • Dart version 2.0.0-dev.58.0.flutter-f981f09760
  
  [✓] Android toolchain - develop for Android devices (Android SDK 28.0.0)
      • Android SDK at /Users/maurits/Library/Android/sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-28, build-tools 28.0.0
      • ANDROID_HOME = /Users/maurits/Library/Android/sdk
      • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
      • All Android licenses accepted.
  
  [✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 9.4.1, Build version 9F2000
      • ios-deploy 1.9.2
      • CocoaPods version 1.5.3
  
  [✓] Android Studio (version 3.1)
      • Android Studio at /Applications/Android Studio.app/Contents
      • Flutter plugin version 25.0.1
      • Dart plugin version 173.4700
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
  
  [!] VS Code (version 1.24.1)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension not installed; install from
        https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
  
  [✓] Connected devices (1 available)
      • iPhone X • 69C349CF-81E1-47E8-B35A-A149D885CE43 • ios • iOS 11.4 (simulator)
  </code></pre>
  
  <p>Any help would be greatly appreciated.</p>