Automatic update of fbcode/onnx to 42804705bdbf179d1a98394008417e1392013547 (#14777)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/14777

Previous import was 6b34743d2e361bbc0acb29dd73536478cb92562e

Included changes:
- **[4280470](https://github.com/onnx/onnx/commit/4280470)**: Changes done internally at Facebook (#1668) <Lu Fang>
- **[f85221f](https://github.com/onnx/onnx/commit/f85221f)**: Fuse MatMul and Add into Gemm (#1542) <vloncar>
- **[022230e](https://github.com/onnx/onnx/commit/022230e)**: Replace np.long by np.int64 (#1664) <G. Ramalingam>
- **[0ab3c95](https://github.com/onnx/onnx/commit/0ab3c95)**: Infer shape from data in Constant nodes (#1667) <Shinichiro Hamaji>

Reviewed By: bddppq

Differential Revision: D13330082

fbshipit-source-id: 13cf328626cf872d0983bbd2154d95c45da70f1c

diff --git a/third_party/onnx b/third_party/onnx
index 6b34743..4280470 160000 (submodule)
--- a/third_party/onnx
+++ b/third_party/onnx
@@ -1 +1 @@
-Subproject commit 6b34743d2e361bbc0acb29dd73536478cb92562e
+Subproject commit 42804705bdbf179d1a98394008417e1392013547