C#: Add some more projects to the flow summaries test.

Author: michaelnebel

csharp/ql/test/library-tests/dataflow/library/options

@@ -5,5 +5,7 @@ semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resour
 semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/ServiceStack/8.5.2/ServiceStack.csproj
 semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/ServiceStack.OrmLite.SqlServer/8.5.2/ServiceStack.OrmLite.SqlServer.csproj
 semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/EntityFramework/6.5.1/EntityFramework.csproj
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/System.Drawing.Common/9.0.1/System.Drawing.Common.csproj
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/System.Windows.Extensions/9.0.1/System.Windows.Extensions.csproj
 semmle-extractor-options: ${testdir}/../../../resources/stubs/System.Web.cs
 semmle-extractor-options: ${testdir}/../../../resources/stubs/EntityFrameworkCore.cs