skip_if_rocm test_rnn in test_c10d_spawn.py (#40577)
Summary:
Test was added a few months back in https://github.com/pytorch/pytorch/issues/36503 but recently became flaky for ROCm.
CC ezyang xw285cornell sunway513
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40577
Differential Revision: D22258196
Pulled By: ezyang
fbshipit-source-id: 8a22b0c17b536b3d42d0382f7737df0f8823ba08
