Handle multiple schemes with match

[GlisboaDev]

How do we handle the case with multiple targets on match?
App, watch, tvOS, extensions, etc
right now we're duplicating in the file. there should be better ways to do it.
one of them is:
http://stackoverflow.com/questions/34106519/define-array-in-env-file-for-snapshot

[GabrielCartier]

Not sure about the best way to do it right now, I believe this was a pretty good solution, let's go with that.

[GabrielCartier]

@kirakik mind checking this?

[kirakik]

@GlisboaDev @GabrielCartier what about this? https://github.com/fastlane/fastlane/blob/master/fastlane/docs/FAQs.md#multiple-targets-of-the-same-underlying-app