[Bug c++/82711] -Wignored-qualifiers could be moved into -Wextra

[sylvestre at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82711

--- Comment #3 from Sylvestre Ledru <sylvestre at debian dot org> ---
Jonathan, if I write a patch to implement the change, will you accept it?