[Bug fortran/96870] Class name on error message

[jrfsousa at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96870

--- Comment #1 from José Rui Faustino de Sousa <jrfsousa at gmail dot com> ---
Patch posted:

https://gcc.gnu.org/pipermail/fortran/2020-August/054955.html