The latest Sierra had a few surprises:
* CITextFeature is now 64bits only;
* The MediaPlayer framework is now 64bits only [1]
Both made the classic tests fails for XM.
[1] https://bugzilla.xamarin.com/show_bug.cgi?id=52065
Those tests needs to be run with the linker disabled since they use
reflection for most of their work.
The original dontlink (for linker tests) was becoming too large in
some configuration (e.g. tvOS release with bitcode) but this was
due to other BCL assemblies (not the introspection tests)
Sebastien Pouliot
Chris Hamons