Set enablempi from petsc_mpi.m4
Set enablempi from petsc_mpi.m4

Otherwise we miss it in config_summary.m4

BalticPinguin/libmesh,libMesh/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,dschwen/libmesh,libMesh/libmesh,dschwen/libmesh,jwpeterson/libmesh,dschwen/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,libMesh/libmesh,jwpeterson/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,dschwen/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,libMesh/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,roystgnr/libmesh,jwpeterson/libmesh,libMesh/libmesh,dschwen/libmesh,libMesh/libmesh,roystgnr/libmesh,dschwen/libmesh,dschwen/libmesh,jwpeterson/libmesh,roystgnr/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,dschwen/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,libMesh/libmesh,roystgnr/libmesh,jwpeterson/libmesh,libMesh/libmesh,capitalaslash/libmesh