This flag is documented in the GCC 4.6 manual, and recognized by
Clang as well. Let's rip off the cc-option switch.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NSedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: NNathan Chancellor <natechancellor@gmail.com>
Acked-by: NKees Cook <keescook@chromium.org>
Tested-by: NNick Desaulniers <ndesaulniers@google.com>