fix for nvtxstring not printing name for aten kernels (#57407)
Summary:
aten kernels have a sequence number of -1
In order to ensure the names are properly printed in every case, we must change the >= 0 to => -1
Example of bug:
![Capture](https://user-images.githubusercontent.com/20074092/116767312-45959280-a9e4-11eb-92a3-c2236a00d481.PNG)
Example of fix:
![image](https://user-images.githubusercontent.com/20074092/116919709-82d96a80-ac06-11eb-8b74-e34cf1214ea5.png)
Additionally, while fixing and investigating this issue another issue was detected and has now been filed:
https://github.com/pytorch/pytorch/issues/57476
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57407
Reviewed By: anjali411
Differential Revision: D28165818
Pulled By: ngimel
fbshipit-source-id: dd3d245f1ea23c4b2edfcedbed3b47705ec1e966