Merge changes I69e6489d,Ic17d52a7

* changes:
  liblog: add android_lookupEventTagNum
  liblog: add /dev/event-log-tags for Tag Map
tree: 2d9f29b395f54b4d22fa2c59ae21384f38bd5221
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/