[DNNL] The labels are incorrect for squeezeNet(OpenVINO)

[Christywl]

Test Env:
Chromium Version: nightly build 75.0.3739.0 (f456c6d)
Platform: Linux/Windows/macOS

Expected Result:
The labels should be correct.

Actual Result:
The labels are incorrect for squeezeNet(OpenVINO):

How to Reproduce:

1. Setup test server and start
2. Visit http://localhost:8080/examples/image_classification
3. Select FAST_SINGLE_ANSWER
4. Select squeezeNet(OpenVINO)

[pinzhenx]

This might be an issue in the softmax. If we bypass the softmax, i.e. set SOFTMAX under mkldnn to False, and enable dual-backend, say WASM + FAST, then it works fine.

[pinzhenx]

It seems that it’s the input shape of the softmax that leads to the wrong results: [1,1000] is ok but not the [1,1,1,1000].

#884