[singa] branch dev updated (95f7b39 -> 1861484)

[wa...@apache.org]

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wangwei pushed a change to branch dev
in repository https://gitbox.apache.org/repos/asf/singa.git.


    from 95f7b39  Merge pull request #794 from dcslin/multbroadcast
     new cc25f79  add erf operator
     new 9f036b2  add ro_bert_a model
     new 46f3339  Merge branch 'multbroadcast' into add-RoBERTa-model
     new 87eabef  Merge branch 'dev' into add-RoBERTa-model
     new e6288fe  fix bug for ignore last dim
     new cc7c6b3  fix bug within sonnx for multi-dim gemm
     new 1861484  Merge pull request #778 from joddiy/add-RoBERTa-model

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Summary of changes:
 examples/onnx/{gpt2/gpt2.py => ro_bert_a.py} | 51 ++++++++++++----------------
 python/singa/autograd.py                     | 41 +++++++++++++++++-----
 python/singa/layer.py                        |  6 ++--
 python/singa/sonnx.py                        |  7 ++--
 test/python/test_operation.py                | 28 +++++++++++++++
 5 files changed, 90 insertions(+), 43 deletions(-)
 copy examples/onnx/{gpt2/gpt2.py => ro_bert_a.py} (66%)