elementary: Fix T2573: Extra blank line in Genlist Dnd Test

Summary: This fixes ticket T2573 where an extra new line was being
added after dropping an item in the Genlist DnD tests. There's really
no need to be appending a '\n' on each item here as that ends up
adding an extra blank item to the drop.

@fix

Signed-off-by: Chris Michael <cp.michael@samsung.com>

legacy/elementary/src/bin/test_dnd.c

@@ -84,7 +84,6 @@ _drag_data_build(Eina_List **items)
                {
                   strcat((char *) drag_data, FILESEP);
                   strcat((char *) drag_data, t);
-                  strcat((char *) drag_data, "\n");
                }
           }
      }