[PATCH] Fix -traditional-cpp preprocessing (PR preprocessor/39213)

[Eric Botcazou]

> This patch adds the same test to traditional preprocessing.  I've
> bootstrapped/regtested it on x86_64-linux and i686-linux and tries to
> preprocess a couple of large files with -traditional-cpp without any
> difference, but I can't reproduce the original problem.  CCing
> Eric who has managed to reproduce it on Solaris.

I replied earlier today under the PR though, the patch doesn't seem to work 
for me.  I'm ready to dig further of course.

-- 
Eric Botcazou