PFW: Update CFLAGS to add Wall, Werror, Wextra everywhere

BZ: 129048

Some Makefiles of the PFW projects are missing the regular CFLAGS
-Wall, -Werror and -Wextra.

This patch aims to update the CLFAGS of these Makefiles. Some source
code had to be updated because warnings are now considered as errors.

Change-Id: Icc91f7bdc649118f822411d9b4693776a84037e9
Signed-off-by: Frédéric Boisnard <fredericx.boisnard@intel.com>
Reviewed-on: http://android.intel.com:8080/123977
Reviewed-by: Rocard, KevinX <kevinx.rocard@intel.com>
Reviewed-by: De Chivre, Renaud <renaud.de.chivre@intel.com>
Tested-by: Dixon, CharlesX <charlesx.dixon@intel.com>
Reviewed-by: cactus <cactus@intel.com>
Tested-by: cactus <cactus@intel.com>
5 files changed