Re-tighten default compiler options.
Re-tighten default compiler options.

Remove "-Wno-unused-parameter -Wno-unused-but-set-parameter" added for
GCC 4.8 experiment.

BUG: 10495043
Change-Id: I774deb09c782fe79eb473fdefd471725a1f97fd5

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build