Merge changes Ib0530b9d,I981d9fa6,Icc60dd06,I902ba6b4

* changes:
  logd: log buffer switch to std::list
  logd: white and black switch to std::list
  logd: logtimes switch to std::list
  logd: prune 10% or 256 entries max
tree: bd1f42ac4b51ed2661c9f02a81bae448e5ea94b8
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/