[Bug 36296] valgrind shows a potential leak in msvcp90/tests/ios.c

https://bugs.winehq.org/show_bug.cgi?id=36296

--- Comment #3 from Austin English  ---
(In reply to Piotr Caban from comment #1)
> This is caused by optimization that skips memory freeing when dll is
> unloaded on process exit. You need to disable it before using valgrind.
> Maybe we should think about a way of running the tests with cleanup code
> executed.

That would be very useful, for Coverity and maybe Clang or other tools as well.