Add SPARC Solaris options from specs to new sparc/sol2.opt

[Eric Botcazou]

> Tested building cc1 and xgcc for cross to sparc-solaris2.8.  OK to
> commit?  (Or, in the alternative, OK to commit the obvious patch to
> remove %{sun4:} %{target:} from specs in sol2-bi.h?)

I'd personally be in favor of the latter solution.  What do you think, Rainer?

-- 
Eric Botcazou