am 3161795b: when logging free space on /data, log /system and /cache as well

Merge commit '3161795b2353171bb0636fb3ea6dab7dec80a4f4' into eclair

* commit '3161795b2353171bb0636fb3ea6dab7dec80a4f4':
  when logging free space on /data, log /system and /cache as well