Resolve host_define.h warnings (#19917)
Summary:
Eigen was updated with the commit needed to get rid of this warning that plagued the CI. This PR bumps third_party/eigen to that commit head.
```
warning: #warning "host_defines.h is an internal header file and must not be used directly. This file will be removed in a future CUDA release. Please use cuda_runtime_api.h or cuda_runtime.h instead." [-Wcpp]
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19917
Differential Revision: D15218183
Pulled By: ezyang
fbshipit-source-id: 653c7d61ea401a7d4469c2009612dc43cc70122d
