ECL needs GCC 15 patch on debian-sid, ubuntu-questing

[Matthias Koeppe]

https://github.com/passagemath/passagemath/issues/1438
https://github.com/passagemath/passagemath/tree/main/build/pkgs/ecl/patches

-- 
Matthias Koeppe -- http://www.math.ucdavis.edu/~mkoeppe