RFC: TLS improvements for IA32 and AMD64/EM64T

[Menezes, Evandro]

Alexandre, 

> Here's a patch for the x86-64 ABI document that adds the new 
> relocations and references the new dynamic table numbers, 
> referring to the latest version of my specs on the web for details.

Please add the respective calculations and coding examples.

Thanks,

_______________________________________________________
Evandro Menezes                          GNU Tools Team
512-602-9940                                        AMD
evandro.menezes@amd.com                      Austin, TX