Make it easier to submit XM apps to AppStore

[spouliot]

QuickTime/QTKit is deprecated by Apple. Applications using it are rejected on the Mac App Store.

We cannot remove the API, without causing breaking changes, from Xamarin.Mac.dll but we can add an option to mmp to remove (as much as necessary of) QTKit bits to allow successful submissions.

Note: when using the managed linker (e.g. Link Framework SDKs only) then QTKit is removed (unless the application needs it). As such this enhancement is mostly for applications that can't (or do not want, e.g. extensibility) use the managed linker.

[spouliot]

from slack discussion

Rolf Kvinge [09:34]
I wonder if we should fine some solution to the QuickTime/QT prohibition

Sebastien Pouliot [09:34]
@Rolf yes

Rolf Kvinge [09:35]
maybe add --allow-prohibited-frameworks to mmp
or move those frameworks out of Xamarin.Mac.dll

Alex Soto [09:35]
Breaking change?
--allow-prohibited-frameworks sounds reasonable

Sebastien Pouliot [09:35]
not if done in mmp, I was thinking of --appstore-compliant
--allow-prohibited-frameworks requires the linker to always run

Rolf Kvinge [09:36]
not necessarily
we just don't link with the banned frameworks
or is Apple looking for strings in the executable?

Sebastien Pouliot [09:37]
hmm… not sure in this case - they do for other banned API
easy to try
let’s file that 🙂