add comment to test_relative_dir.cfg

data/test/scenarios/test_relative_dir.cfg

@@ -1,3 +1,9 @@
+#Note that this is not actually a unit test,
+#it is just a test to visually inspect what
+#get relative dir, and the map location 
+#rotation function, are doing, for purpose of
+#manual debugging.
+
 #define ROTATE_HEX_WITH_TERRAIN terrain
 [store_rotate_map_location]
     variable="ml"