- fix fill_constant bug.
- cast op support int64_t->int32_t

fill_constant kernel only registered float type, only the float data type is produced, which is obviously a bug.

Now, produce data based on the data type attr.

By the way, fix the cast kernel bug.

* add cast from uint8 to float, test=develop

* add unsqueeze and range op. modify concat op test=develop

* modify exception in range_test_x86

* modify cast op, test=develop

* modify cast op and remove warning in argmax_test, test=develop