3.4 PATCH: Don't pass -g* via cpp_options (PR bootstrap/12173)

[Rainer Orth]

Rainer Orth writes:

> This patch, proposed by Alexandre Oliva
> 
> 	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12173#c8
> 
> fixed the bootstrap problem described in PR bootstrap/12173 on
> mips-sgi-irix6.5o32.  The bootstrap on that platform succeeeded without
> regressions.
> 
> Ok for mainline?

Neil has approved this in private mail, so I'm checking it in.

	Rainer