message: Update Eigen to commit
  Partial packet load with a mask.
diff: @@ -149,11 +149,11 @@ def tf_workspace(path_prefix = "", tf_repo_name = ""):
  name = "eigen_archive",
  build_file = clean_dep("//third_party:eigen.BUILD"),
  patch_file = clean_dep("//third_party/eigen3:gpu_packet_math.patch"),
  - sha256 = "8b3e1c0494af6b616ef3f2a107e093be1ea57c6a34f277edb2bdb1dbf3e3870a",
  - strip_prefix = "eigen-eigen-4fe5a1014743",
  + sha256 = "83658ef0f4c88a9ac1dfc11a34573d54febb6321e22fd0fa4a63565c43bc9e95",
  + strip_prefix = "eigen-eigen-973d172a72e8",
  urls = [
  - "http://mirror.tensorflow.org/bitbucket.org/eigen/eigen/get/4fe5a1014743.tar.gz",
  - "https://bitbucket.org/eigen/eigen/get/4fe5a1014743.tar.gz",
  + "http://mirror.tensorflow.org/bitbucket.org/eigen/eigen/get/973d172a72e8.tar.gz",
  + "https://bitbucket.org/eigen/eigen/get/973d172a72e8.tar.gz",
  ],
  )
  