Update openvino-mobilenet-raw and openvino-road-segmentation-adas

[hydai]

These two examples need to implement a conversion for the input tensor shape.

openvino-mobilenet-raw has the same issue.

openvino-road-segmentation-adas too.

Originally posted by @yamt in #190 (comment)

[hydai]

Hi @LFsWang
Could you please also update these two examples?