[inductor] Trivial smoke-test (#87598)
As we're bringing up dynamo+inductor on Meta-internal infra, I keep
wanting a stupidly simple program to run to see if anything at all is working.
This test is that program :-p.
Obviously test_torchinductor.py is more comprehensive but it's also harder to
tell exactly what's going on, whereas this test fits on one screen.
Differential Revision: [D40595798](https://our.internmc.facebook.com/intern/diff/D40595798/)
**NOTE FOR REVIEWERS**: This PR has internal Meta-specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D40595798/)!
cc @jansel @lezcano @fdrocha @mlazos @soumith @voznesenskym @yanboliang @penguinwu @anijain2305
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87598
Approved by: https://github.com/anijain2305, https://github.com/brad-mengchi
