message: Add ios_static_framework bazel target for Swift
  This adds an `ios_static_framework` target that builds the Swift
  library for bundling it in other apps.
diff: load("//tensorflow/lite:special_rules.bzl", "ios_visibility_whitelist", "tflite_ios_lab_runner")
  load("//tensorflow/lite/experimental/ios:ios.bzl", "TFL_DEFAULT_TAGS", "TFL_DISABLED_SANITIZER_TAGS", "TFL_MINIMUM_OS_VERSION")
  -load("@build_bazel_rules_apple//apple:ios.bzl", "ios_application", "ios_unit_test")
  +load("@build_bazel_rules_apple//apple:ios.bzl", "ios_application", "ios_static_framework", "ios_unit_test")
  load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
  package(
  @@ -39,6 +39,16 @@ swift_library(
  ],
  )
  +# bazel build -c opt --config=ios_fat //tensorflow/lite/experimental/swift:TensorFlowLite_framework
  +ios_static_framework(
  + name = "TensorFlowLite_framework",
  + bundle_name = "TensorFlowLite",
  + minimum_os_version = TFL_MINIMUM_OS_VERSION,
  + deps = [
  + ":TensorFlowLite",
  + ],
  +)
  +
  ios_unit_test(
  name = "Tests",
  size = "small",
  