Explain hack in demo script

test/4_Lulesh/demo.sh

@@ -9,7 +9,8 @@ echo "null" > merged.ipcg
 #this is cgmerge from metacg
 cgmerge merged.ipcg *.ipcg
 
-
+# This is a dirty hack to circumvent the generation of origin data,
+# as it is buggy in the current metacg release
 sed -i 's/fileProperties/FileProperties/g' merged.ipcg
 
 #this currently uses hardcoded include directories as to be compatible with C++