Singly linked lists are now default for P2012.

DefineOptions.cmake

@@ -28,7 +28,7 @@ if (P2012)
   set(MAX_COALESCE_SIZE 60000)
   set(WITH_SPLITTING "variable")
   set(MIN_SPLITTING_SIZE 300)
-  set(BLOCKS_ORGANIZATION "dll")
+  set(BLOCKS_ORGANIZATION "sll")
 endif (P2012)
 
 if (LINUXTEST)