Added missing value “SERVICES” to BundleIDPlatform

[Workshed]

This is really just re-adding this PR. These modifications easily got lost on updating the API spec from Apple (if Apple haven't fixed the issue).

Perhaps a solution to this ongoing situation would be adding some kind of mechanism to reapply modifications to the JSON spec before code generation (and remove them as Apple fix them). I'll perhaps try and look in to that if i can find some spare time.