Check CUDA kernel launches in caffe2/caffe2/utils/math (#50238)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50238
Added `C10_CUDA_KERNEL_LAUNCH_CHECK();` after all kernel launches in caffe2/caffe2/utils/math
Test Plan:
```
buck build //caffe2/caffe2
```
{F356531214}
files in caffe2/caffe2/utils/math no longer show up when running
```
python3 caffe2/torch/testing/check_kernel_launches.py
```
Reviewed By: r-barnes
Differential Revision: D25773299
fbshipit-source-id: 28d67b4b9f57f1fa1e8699e43e9202bad4d42c5f
