title: flutter can't build with Xcode11.3
body: <p>After updating xcode, I cannot build flutter code with xcode.  </p>
  
  <p>Each tools are<br>
  xcode version is 11.3<br>
  Flutter 1.12.13+hotfix.5 • channel stable<br>
  Dart 2.7.0  </p>
  
  <p>And log is following.<br>
  How can I solve it?</p>
  
  <pre><code>...
  
  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk/System/Library/Frameworks/CoreMedia.fr
      amework/Headers/CoreMedia.h:15:10: note: in file included from
      /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk/System/Library/Frameworks/CoreMedia.fr
      amework/Headers/CoreMedia.h:15:
      #include &lt;CoreMedia/CMFormatDescription.h&gt;
               ^
      /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk/System/Library/Frameworks/CoreMedia.fr
      amework/Headers/CMFormatDescription.h:26:10: error: could not build module 'CoreAudio'
      #include &lt;CoreAudio/CoreAudioTypes.h&gt;
               ^
      /Users/naohide_a/Workspace/flutter/sample/ios/Runner/Runner-Bridging-Header.h:1:9: note: in file included from
      /Users/naohide_a/Workspace/flutter/sample/ios/Runner/Runner-Bridging-Header.h:1:
      #import "GeneratedPluginRegistrant.h"
              ^
      /Users/naohide_a/Workspace/flutter/sample/ios/Runner/GeneratedPluginRegistrant.h:8:9: error: could not build module 'Flutter'
      #import &lt;Flutter/Flutter.h&gt;
              ^
      192 errors generated.
      &lt;unknown&gt;:0: error: failed to emit precompiled header
      '/Users/naohide_a/Library/Developer/Xcode/DerivedData/Runner-gfrbptjupluobbdhelljevlsxpqy/Build/Intermediates.noindex/PrecompiledHeaders/Runner-Bridging-He
      ader-swift_16EJIZIOPB8S-clang_KLU4EDN5EN1U.pch' for bridging header '/Users/naohide_a/Workspace/flutter/sample/ios/Runner/Runner-Bridging-Header.h'
      &lt;unknown&gt;:0: error: generate-pch command failed with exit code 1 (use -v to see invocation)
      note: Using new build system
      note: Planning build
      note: Constructing build description
  
  Could not build the application for the simulator.
  Error launching application on iPhone 11 Pro Max.
  
  </code></pre>