Drift: device distance

[jjhursey]

List: https://github.com/openpmix/pmix-tests/blob/08705b12294fc5020f2af951b9bb10b36b6cec8d/check-standard/etc/openpmix_master-pmix-standard_master.txt#L175-L183

#---------------------------------------------------------
# Needs Review:
#  OpenPMIx: 7a0fa0455
#  OpenPMIx PR: 
#---------------------------------------------------------
PMIx_Device_distance_construct
PMIx_Device_distance_create
PMIx_Device_distance_destruct
PMIx_Device_distance_free