* System.dll.sources: Add IDesignerHostTransactionState.cs and
TypeDescriptionProviderService.cs to our build.
System.ComponentModel.Design/DesignerVerb.cs
System.ComponentModel.Design/DesigntimeLicenseContext.cs
System.ComponentModel.Design/DesigntimeLicenseContextSerializer.cs
+System.ComponentModel.Design/IDesignerHostTransactionState.cs
+System.ComponentModel.Design/TypeDescriptionProviderService.cs
System.ComponentModel/DesignerAttribute.cs
System.ComponentModel/DesignerCategoryAttribute.cs
System.ComponentModel/DesignerSerializationVisibilityAttribute.cs