Merge pull request github#16088 from hvitved/csharp/library-property-store

C#: Include all non-source-code properties in data flow

Author: hvitved

csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll

@@ -1997,6 +1997,8 @@ class FieldOrProperty extends Assignable, Modifiable {
           or
           p.getDeclaringType() instanceof AnonymousClass
         )
+        or
+        p.fromLibrary()
       )
   }