[PATCH] ppc ulps fixes

[Roland McGrath]

> I think it is better to merge ulps results rather than regenerate, that way
> we don't suddenly start getting many errors when using slightly older
> compilers.

I must confess I didn't really know what to do with ulps updates, and I
don't think I had ever done one before.  I just did what seemed to be the
most obvious thing from README.libm-test.


Thanks,
Roland