[auto] Update onnx to 54be8fa - Use cmake3 if it's available (pytorch#718)

onnxbot · onnxbot · commit d33ec12d1e3f · 2018-04-05T17:57:26.000Z
onnx/onnx@54be8fa
diff --git a/third_party/onnx b/third_party/onnx
@@ -1 +1 @@
-Subproject commit b8c423889b3d15825e90fd5bd8fa1766ba2200ce
+Subproject commit 54be8fad1e8e617d7c24b823de65fe9ebdb1f342
