TypeDescriptorTest.TestCreateDesigner and TestGetAttributes broken on FullAOT

[akoeplinger]

Steps to Reproduce

1. Run System tests in FullAOT config
2. Observe the two tests failing

This started with https://jenkins.mono-project.com/job/test-mono-mainline-linux-fullaot/label=debian-9-amd64/657:

• [MacSDK] Update LLVM to head of mono/llvm's master (commit: 3b700c8)
• [System] ComponentModel and System.Net from corefx ([System] ComponentModel and System.Net from corefx #7948) (commit: 09de0b9)
• [runtime] Handle failed classes in mono_type_get_checked (). ([runtime] Handle failed classes in mono_type_get_checked (). #8318) (commit: 3783e07)
• [msvc] Update csproj files ([msvc] Update csproj files #8392) (commit: 2f08c62)

Current Behavior

https://jenkins.mono-project.com/job/test-mono-mainline-linux-fullaot/label=debian-9-amd64/657/testReport/

TypeDescriptorTests.TestCreateDesigner

MESSAGE:
#1
  Expected: True
  But was:  False 
+++++++++++++++++++ 
STACK TRACE:
  at MonoTests.System.ComponentModel.TypeDescriptorTests.TestCreateDesigner () [0x00015] in /mnt/jenkins/workspace/test-mono-mainline-linux-fullaot/label/debian-9-amd64/mcs/class/System/Test/System.ComponentModel/TypeDescriptorTests.cs:1102
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0003b] in <a5c75021540542b9ae3f792fe1932484>:0

TypeDescriptorTests.TestGetAttributes

MESSAGE:
#A2   
  Expected: not null   
  But was:  null                                                  
+++++++++++++++++++               
STACK TRACE:                                                   
  at MonoTests.System.ComponentModel.TypeDescriptorTests.TestGetAttributes () [0x0002a] in /mnt/jenkins/workspace/test-mono-mainline-linux-fullaot/label/debian-9-amd64/mcs/class/System/Test/System.ComponentModel/TypeDescriptorTests.cs:1136    
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)   
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0003b] in <a5c75021540542b9ae3f792fe1932484>:0

Expected Behavior

No failures.

On which platforms did you notice this

[ ] macOS
[ X ] Linux
[ ] Windows

Version Used: master

[akoeplinger]

@EgorBo this was most likely caused by the ComponentModel import from CoreFX.

[marek-safar]

@EgorBo please look into this