message: Update TFToolchain to 1.4.6
diff: @@ -40,10 +40,10 @@ def tflite_support_workspace1():
  http_archive(
  name = "tf_toolchains",
  - sha256 = "d72b2e52baf0592f5b94347b128ef75422fc22f63dfcf2d5fd46bc732cab052b",
  - strip_prefix = "toolchains-1.3.0",
  + sha256 = "d550e6260b7bd8a7f2c2e3a20ba3c4b6c519985f5a164a1bf3601dd96852a05b",
  + strip_prefix = "toolchains-1.4.6",
  urls = [
  - "http://mirror.tensorflow.org/github.com/tensorflow/toolchains/archive/v1.3.0.tar.gz",
  - "https://github.com/tensorflow/toolchains/archive/v1.3.0.tar.gz",
  + "http://mirror.tensorflow.org/github.com/tensorflow/toolchains/archive/v1.4.6.tar.gz",
  + "https://github.com/tensorflow/toolchains/archive/v1.4.6.tar.gz",
  ],
  )
  