This can then be used to run tests in an appx context, for instance for https://gitlab.winehq.org/wine/wine/-/merge_requests/3548
-- v3: windows.applicationmodel/tests: Test executing a WinRT package application. windows.applicationmodel/tests: Test IPackageManager_RegisterPackageAsync. makedep: Support generating .exe TESTDLL resources. makedep: Use #pragma makedep testdll for TESTDLL resources. windows.applicationmodel/tests: Add some IPackageManager tests. windows.applicationmodel: Add stub DLL.