Use with Firebase device lab workflow step

[wainglaister]

When running tests on firebase device lab the results that come back appear to be the Data contents and Info.plist of an xcresult but files all renamed (for the device the tests ran on) and flattened into a single folder.
It would be good if the workflow step was able to deal with this situation.
(I'm still trying to work out how to deal with the data that comes back currently...)
I guess I can write a script to rebuild this data into xcresult folders and then run coarse on each of those in turn, though that will be a bit messy using the workflow step...