Use C for some rs6000 -D options.

[Andreas Tobler]

Geoff Keating wrote:

>>>Please try this patch and tell me if it works.
>>
>>So, uh, since it works, is there some reason not to check it in
>>now?
> 
> 
> Nope, if it works for you please check it in.  (I never got a final
> report saying the whole build finished.)

Sorry, being offline for three days. I reported a partial and a 
bootstrap success. The bootstrap success did not include the libjava 
build since it was not finished then. But the libjava was also successful.
Thanks again.

Andreas