Revert "Replace printk with pr_*"

This reverts commit b23673672cb55b78fb35d1c1f9a32d65e7eed847.
Revert "Update logger from linux 3.8"

This reverts commit 9cbce03dba889d1a3b621a6aac2ec7050755aed1.
Update lowmemorykiller to linux 3.9