PATCH: Properly support Solaris 2 ABI for symbol versioning in GNU ld

[Nick Clifton]

Hi Rainer,

>> What breaks if you omit these symbols?  If nothing, do you really want
>> to copy the mistakes of the Sun linker?
>
> I haven't found anything yet, still this is a documented part of the
> Solaris 2 ABI and not simply a linker artefact.  Besides, not following
> the ABI here creates trouble for libstdc++ ABI checking when different
> linkers are in use, as explained here:

> Ok for mainline now?

Approved - please apply.

Cheers
   Nick