Merge changes from topic 'logcatd'

* changes:
  init.rc: logd: Add logpersistd (nee logcatd)
  init: change exec parsing to make SECLABEL optional
  logcat: -f run in background
  logcat: -f flag to continue
tree: 2210d41948fab1d2f3a55a1560e900de83cb607c
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/