Logd: Handle unused variable and fields

(cherry pick from commit 45303145bd5a5a28f176338eb9a362e16893cc7d)

For build-system CFLAGS clean-up.

Bug: 18632512
Change-Id: If81d6705b44e9a29f64c44c56ea633c031e831b7
4 files changed
tree: ed75858846f38a8bedf39564136749354a8ffe29
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/