Xcode 13.2.1 requires AssertionServices.framework

[zachwolfe]

Framework /System/Library/PrivateFrameworks/AssertionServices.framework

Test Application Xcode 13.2.1, possibly earlier versions as well.

Steps To Reproduce

1. Extract Xcode_13.2.1.xip to /Applications/Xcode.app
2. Run xcode-select --switch /Applications/Xcode.app
3. Run clang or any other tool that relies on the IDEFoundation framework.

• Produces approximately the following output (I forgot to copy the actual output before adding stubs):

Error loading required libraries. If there is an ongoing installation please wait for it to complete. Otherwise reinstall. 
(dlopen(@rpath/libxcodebuildLoader.dylib, 1): Library not loaded: /System/Library/PrivateFrameworks/AssertionServices.framework/Versions/A/AssertionServices
  Referenced from: /Applications/Xcode.app/Contents/Frameworks/IDEFoundation.framework/Versions/A/IDEFoundation
  Reason: image not found)

System Information WSL2, with my own build of Darling.

Software	Version
Darling	597325bc702e7b0893ade8272000a4086b23f121

As alluded to above, I have already generated stubs by following the docs, which fixed this issue (now I fail on #1007). Shall I open a PR?

[facekapow]

Absolutely; if you have stubs already generated, definitely go ahead and open a PR for them.