Merge changes I7cbc8fda,Ibb7cf4b1

* changes:
  liblog: test: security buffer is allowed to be denied
  liblog: test: do not LOG in signal handler
tree: 65f3a455ca54ad998c8a14c6d63a781e089563e1
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/