Add the latest C++ SD-6 additions.

[Jason Merrill]

On 11/09/2014 08:33 PM, Ed Smith-Rowland wrote:
> +  //cpp_hashnode *node = 0;
> +      //node = token->val.node.node;
> +  //if (node)
> +  //  pfile->mi_ind_cmacro = node;

Remove this commented-out code?

The patch is OK.

Jason