testsuite result updates for x86_64-w64-mingw32

[Eric Botcazou]

> There are new testsuite results for x86_64-w64-mingw32, for versions
> 6.4.1, 7.3.1, 8.2.1 and 9.0.0.
> 
> https://gcc.gnu.org/ml/gcc-testresults/2018-10/msg02309.html
> https://gcc.gnu.org/ml/gcc-testresults/2018-10/msg02310.html
> https://gcc.gnu.org/ml/gcc-testresults/2018-10/msg02312.html

So we have an additional ACATS failure (ce2104c) in 8.2.1 over the previous 
releases?  Feel free to open a PR about it if you have a couple of minutes.

Thanks for testing the Ada compiler!

-- 
Eric Botcazou