C#: Adjust paths relative to the test directory for CWE-089 test dependencies.

Author: michaelnebel

csharp/ql/test/query-tests/Security Features/CWE-089/options

@@ -1,6 +1,6 @@
 semmle-extractor-options: /nostdlib /noconfig
-semmle-extractor-options: --load-sources-from-project:../../../resources/stubs/Dapper/2.0.90/Dapper.csproj
-semmle-extractor-options: --load-sources-from-project:../../../resources/stubs/System.Data.SqlClient/4.8.3/System.Data.SqlClient.csproj
-semmle-extractor-options: --load-sources-from-project:../../../resources/stubs/System.Data.SQLite/1.0.116/System.Data.SQLite.csproj
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/Dapper/2.0.90/Dapper.csproj
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/System.Data.SqlClient/4.8.3/System.Data.SqlClient.csproj
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/System.Data.SQLite/1.0.116/System.Data.SQLite.csproj
 semmle-extractor-options: ${testdir}/../../../resources/stubs/EntityFramework.cs
 semmle-extractor-options: ${testdir}/../../../resources/stubs/System.Windows.cs