[PATCH 10/14] Enable -fstack-protector=* when requested by configure.

[Nix]

On 24 Feb 2016, Andreas Schwab stated:

> Nix <nix@esperi.org.uk> writes:
>
>> -+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
>> ++cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) $(+stack-protector)
>
> Please fold long lines.

I wasn't sure it was syntactically valid here (as in the bit of
configure.ac with a long line). Clearly I was missing the nose on my
face: glibc folds += lines *all the time*. Will fix.

-- 
NULL && (void)