V3 static data in classes vs AIX

[Benjamin Kosnik]

> This is the same kind of thing we've had to work through multiple
> times for AIX.

Umm... perhaps a g++ testsuite entry could be added so that this is more 
clearly identified in the future?

>   - Remove the code in decl2.c, and then add explicit instantiations
>     for these static data members (if they are not already present
>     in V3).  This makes the handling of all static data members 
>     consistent.

Right. Let's do this.

-benjamin