Add examples/portable/test to pytest (#3703)

Summary: Pull Request resolved: https://github.com/pytorch/executorch/pull/3703

Reviewed By: shoumikhin

Differential Revision: D57681858

Pulled By: kirklandsign

fbshipit-source-id: ff676af73d0cd7e1b224ff11eb8907e0104230ad
diff --git a/examples/portable/test/__init__.py b/examples/portable/test/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/examples/portable/test/__init__.py
diff --git a/pytest.ini b/pytest.ini
index f6c8556..32ad382 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -9,6 +9,7 @@
     # don't suppress warnings, but don't shove them all to the end either
     -p no:warnings
     # explicitly list out tests that are running successfully in oss
+    examples/portable/test
     # sdk/
     sdk/bundled_program/serialize
     sdk/bundled_program/test/test_bundle_data.py