编译出模型转换工具后，执行
    ./MNNConvert -f CAFFE —OP
    可打印 CAFFE 算子支持列表

    1. AbsVal
    2. ArgMax
    3. BNLL
    4. BatchNorm
    5. Bias
    6. Concat
    7. Convolution
    8. Convolution3D
    9. ConvolutionDepthwise
    10. Crop
    11. CuDNNBatchNorm
    12. CuDNNGroupedConvolutionForward
    13. CuDNNLRNCrossChannel
    14. CuDNNLstmForward
    15. Deconvolution
    16. DepthwiseConv
    17. DetectionOutput
    18. Dropout
    19. ELU
    20. Eltwise
    21. Embed
    22. Exp
    23. Flatten
    24. Im2seq
    25. InnerProduct
    26. Input
    27. Interp
    28. LRN
    29. Log
    30. Lstm
    31. MVN
    32. Normalize
    33. OCRLSTM
    34. OCRLSTMQ
    35. PReLU
    36. Permute
    37. Pooling
    38. Pooling3D
    39. Power
    40. PriorBox
    41. Python
    42. ROIPooling
    43. ReLU
    44. ReLU6
    45. Reduction
    46. Reshape
    47. Resize
    48. Scale
    49. Seq2out
    50. ShuffleChannel
    51. Sigmoid
    52. Slice
    53. Softmax
    54. SpatialProduct
    55. Split
    56. TanH
    57. Threshold
    58. Upsample