Merge "logcat: improve --help and error messages" am: bb4754bef9
am: 53f7812a8e

Change-Id: Iff6242509e5cb9de47469984b1ab6361346c09e4
tree: a4be98f20d1c7b47bb73c0759c14efcdb9c0e64e
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/