[RFA] Implement DW_TAG_*_parameter_pack

[Jason Merrill]

On 09/25/2009 02:31 PM, Cary Coutant wrote:
> Those numbers work, but to forestall future conflicts with more GNU
> extensions, you might want to move the declarations down below
> DW_TAG_GNU_template_template_param = 0x4106. I'll leave it up to you
> and Jason as to whether you should include "GNU_" in the name.

Yes, I think we should use GNU_ until the extension is actually added to 
the spec.

Jason