WIP: Build works fine on latest master with some small modifications (DS branch ios-build):

Build for simulator x86_64:

$ bazel build --verbose_failures --config=ios_x86_64 --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt //native_client:libdeepspeech.so --define=runtime=tflite --copt=-DTFLITE_WITH_RUY_GEMV
$ cp -f bazel-bin/native_client/libdeepspeech.so ../native_client/swift/libdeepspeech.so

Build for arm64:

$ bazel build --verbose_failures --config=ios_arm64 --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt //native_client:libdeepspeech.so --define=runtime=tflite --copt=-DTFLITE_WITH_RUY_GEMV
$ cp -f bazel-bin/native_client/libdeepspeech.so ../native_client/swift/libdeepspeech.so

Scope for 0.8:

• Does it actually run? Need to write a test app
• How to embed and load model in device/simulator
• Install full Xcode (not just command line tools) in CI workers
  • Create worker VMs locally to test changes
  • Get it working on new worker
  • Upgrade normal workers
  • Land code and CI changes
• Publish native_client package for iOS
• Publish deepspeech_ios.framework

Future scope:

• Publish Swift docs on RTD (no Doxygen support, https://github.com/AnarchyTools/anarchy_sphinx only works with older Sphinx, maybe SourceKitten can be used)
• How to test things in CI (can we embed a command line client binary in a test app and call it via simctl somehow to get stdout/stderr?)