PATCH: Add gold support for TLS descriptors

[Ian Lance Taylor]

"Cary Coutant" <ccoutant@google.com> writes:

> 	* symtab.cc (sized_finalize_symbol): Add check for TLS symbol.
> 	* x86_64.cc (Target_x86_64::define_tls_base_symbol): New function.
> 	(Target_x86_64::tls_base_symbol_defined_): New field.
> 	(Target_x86_64::Scan::local): Define _TLS_MODULE_BASE_ symbol.
> 	(Target_x86_64::Scan::global): Likewise.

This is OK.

Thanks.

Ian