[Bug libgcc/95712] configure-target-libgcc fails on s390x target because xgcc is not being built

[egorenar at linux dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95712

--- Comment #4 from Alexander Egorenkov <egorenar at linux dot ibm.com> ---
I also have the same issue with gcc 8.4.0