Added object_p.h file which defines either plain or tracked_ptr to be used.
Added object_p.h file which defines either plain or tracked_ptr to be
used.

smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM