Update paths pointing to tests/data_files

These now point to framework/data_files instead.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 37fe465..041508c 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -340,7 +340,7 @@
     link_to_source(Descriptions.txt)
     link_to_source(compat.sh)
     link_to_source(context-info.sh)
-    link_to_source(data_files)
+    link_to_source(../framework/data_files)
     link_to_source(scripts)
     link_to_source(ssl-opt.sh)
     link_to_source(opt-testcases)