Synchronize submodules
diff --git a/third_party/tensorflow b/third_party/tensorflow
index e665554..68a6fe0 160000
--- a/third_party/tensorflow
+++ b/third_party/tensorflow
@@ -1 +1 @@
-Subproject commit e665554b90a45e93b1444506ae9ee359cdb800e0
+Subproject commit 68a6fe0d984377b625b421d34f8c607d6ed73597