[auto] Update caffe2 to follow pull request 1926

onnxbot · onnxbot · commit 64c4acf8be2c · 2018-02-13T00:25:14.000Z
diff --git a/third_party/caffe2 b/third_party/caffe2
@@ -1 +1 @@
-Subproject commit 07f4f2de58358675845dbf98a0cfd49c871b7d4c
+Subproject commit 217ff701ceccb22bb38b409a4e7dd245cbe2f005
