Summary:
When an app with sonar is run for the first time, the necessary files don't exist.
This is expected, so don't output an error, only error if they do exist but there's some other problem.
Reviewed By: emilsjolander
Differential Revision: D8350995
fbshipit-source-id: ff0a4f0e7a73848f6172c6108a0caee6efb43553
4fbe638adf