Merge "liblog: null terminate log_msg" am: 1153fbbcd3

Change-Id: I783c397431d8dea1959d979a0942f0095a0829e8
tree: 96979a08bbd27430058eeda447e1261d7e56a77e
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/