Bug#1081631: pyzoltan: FTBFS error: ‘MPI_Session’ does not name a type

[Drew Parsons]

Source: pyzoltan
Followup-For: Bug #1081631

Ah, correction, zoltan is not built on the 32-bit arches, so we don't
need to worry about pyzoltan and mpi4py interacting with mpich.