.github: Add initial target specifier config (#39378)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39378
Will initially only contain a label to trigger builds for binary tests
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Differential Revision: D21864091
Pulled By: seemethere
fbshipit-source-id: f69467ccc797b6b320dc8b7f2d50a8601c172a1f
