update .gitmodules to point to glotzerlab forks of HIP/hipCUB
update .gitmodules to point to glotzerlab forks of HIP/hipCUB

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue