Retry icon download
Retry icon download

Summary:
In public CI (only?), asset downloads sometimes fail with a spurious 404.
We already have retrying in place, but it will obviously not do that on a 500.

Reviewed By: nikoant

Differential Revision: D28744817

fbshipit-source-id: b6a185d8e9db45e02c6427233a0171b00c552751

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper