Revert to using configure in the libxc build since its python interface is no longer necessary.
Revert to using configure in the libxc build since its python interface is no longer necessary.

gkc1000/pyscf,gkc1000/pyscf,gkc1000/pyscf,sunqm/pyscf,gkc1000/pyscf,gkc1000/pyscf,sunqm/pyscf,sunqm/pyscf,sunqm/pyscf