Merge changes Ibdc76bc0,I98738c66

* changes:
  logd: liblog: whitelist "snet_event_log"
  liblog: add __android_log_is_loggable checking to writer
tree: c8858e6701ec08007a54785968860290333740df
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/