Merge changes Ieea7af39,Ic3755d1c,Ifad24b27,I3b33f2b8

* changes:
  liblog: remove endianness functions
  liblog: remove unused test #defines and transport code
  liblog: remove stderr logger
  liblog: add -Wall,-Wextra and do related clean-up.
tree: c20dc2efd707cc82f4d1252970cb9c2baf851530
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/