Updating TensorFlow to latest passing continuous build.

Build status: https://source.cloud.google.com/results/invocations/3db0dfce-ab02-456e-a8ee-1703f07bb8e7

PiperOrigin-RevId: 401043049

Author: tensorflower-gardener

WORKSPACE

@@ -15,8 +15,8 @@ workspace(name = "tf_serving")
 load("//tensorflow_serving:repo.bzl", "tensorflow_http_archive")
 tensorflow_http_archive(
     name = "org_tensorflow",
-    sha256 = "9e7edcb524dbe7a1f377a44b829cfc598bb8ef86ef8aaddd49b15cdd8573a659",
-    git_commit = "ac43581891d768378f9a6406d7290a0bb4710264",
+    sha256 = "dfbbc62f8fda798cadd9dc13d653f68e5c8f10c0c2bb3b488f85ae09c20ab3d2",
+    git_commit = "b1ca8461612426212c4ae231c6d5f54f76f28c46",
 )
 
 # Import all of TensorFlow Serving's external dependencies.