Provide virtualization related info in the hs_error file on linux ppc64 / ppc64le

On linux ppc64 / ppc64le, we usually run in virtualized environments (PowerVM / PowerKVM ).
It is helpful, for instance in support cases, to get some information about the virtualized environment in the hs_error file .
A lot of info can be taken from the /proc/ppc64/lparcfg - file on linux ppc64 / ppc64le .

Example hs_err file output for a PowerKVM machine ("(emulated by qemu)" indicates PowerKVM) :

Virtualization information:
system_type=IBM pSeries (emulated by qemu)
partition_max_entitled_capacity=48
system_potential_processors=48
partition_active_processors=6
partition_potential_processors=48
shared_processor_mode=1