Don't pass --build-id by default.

[Rafael Espíndola via cfe-commits]

On 2 June 2016 at 17:06, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
>> This is going to break a lot of my local rpm packaging scripts, and I suspect the same is true for others. This is not a huge deal, but I wonder if we should emulate GCC is this regard and provide some CMake option to keep the current behavior?
>
> Yes, a cmake option is probably best.
>
> What do you think of the attached patch (still building).

It works :-)

Cheers,
Rafael