logd: Add klogd

- Add a klogd to collect the kernel logs and place them into a
  new kernel log buffer
- Parse priority, tag and message from the kernel log messages.
- Turn off pruning for worst UID for the kernel log buffer
- Sniff for 'PM: suspend exit', 'PM: suspend enter' and
  'Suspended for' messages and correct the internal definition
  time correction against monotonic dynamically.
- Discern if we have monotonic or real time (delineation 1980) in
  audit messages.
- perform appropriate math to correct the timestamp to be real time
- filter out any external sources of kernel logging

Change-Id: I8d4c7c5ac19f1f3218079ee3a05a50e2ca55f60d