Xcode8 SDK (for tvOS 10) marked those API with __TVOS_UNAVAILABLE making
them only available on iOS.
Since the API are not yet released in stable (C8) so we can removing
them proactively. It will be easier to add them back later (if the
situation change) than removing/obsoleting them.
* Fixed macOS availability attributes where it made sense
* Added inconclusive members to mac.pending and opened radar://27463602
https://trello.com/c/BPdUlTlg about it
* iOS xtro reported members that got deprecated and introduced on iOS 10
so added that to pending and those members are not bound
Also fixed QLPreviewItem::previewItemTitle (not required) for XAMCORE_4_0
reference:
!incorrect-protocol-member! QLPreviewItem::previewItemTitle is OPTIONAL and should NOT be abstract