am 5689c8b8: am 1fad20cf: am 0c6c4150: Merge changes I2cda9dd7,Ifb560850,I8d4c7c5a

* commit '5689c8b86f5db3175216e502eaae719550c6d886':
  logd: Cleanup
  logcat: liblog: Add "usec" format argument
  logd: Add klogd