Bug#1113225: libxc: FTBFS with CMake 4

[Graham Inggs]

Upstream have moved to GitLab:

https://gitlab.com/libxc/libxc

and it seems this issue has been reported and fixed there:

https://gitlab.com/libxc/libxc/-/issues/570
https://gitlab.com/libxc/libxc/-/merge_requests/696