[GOLD] Add --secure-plt option for ppc32

[Alan Modra]

On Mon, Jan 09, 2017 at 09:10:29AM -0800, Cary Coutant wrote:
> > +  DEFINE_bool(secure_plt, options::TWO_DASHES , '\0', true,
> > +             N_("(PowerPC only) Use new-style PLT.  (default and forced)"),
> > +             NULL);
> 
> Gold's --help will now print "(default)" automatically for this
> option, so it's redundant here. What do you mean by "forced"?

Oops, didn't even look at the help output.  By forced I meant that
there is no --no-secure-plt (or --bss-plt) but saying that isn't
necessary.  Will remove it and the unnecessary "default".

-- 
Alan Modra
Australia Development Lab, IBM