Upgrade benchmark to v1.6.1 to include header patch. (#4145)
Upgrade benchmark to v1.6.1 to include header patch. (#4145)

- https://github.com/google/benchmark/commit/3d1c2677686718d906f28c1d4da001c42666e6d2

Resolve https://github.com/onnx/onnx/issues/4144

Signed-off-by: Tongliang Liao <d8de9c8ad1cb78f67bec4fd08392e0f1e7b9d141@gmail.com>
onnx/onnx,onnx/onnx,onnx/onnx,onnx/onnx