[PATCH] Fix libbacktrace and libiberty tests fail on sanitized GCC due to wrong link options.

[Maxim Ostapenko]

Hi DJ, thanks for review.

 > I don't think anything in the toplevel configury looks "sane" any 
more, but I think this patch is OK.

I'm sorry, I didn't understand this clearly. Does this mean that I 
should wait until Stage 1 starts and commit then, or it is OK now?

-Maxim