The rdc.h is modified for new discovery and grouping APIs.
The RdcGroupSettingsImpl.cc is added to implement the GPU group and
the field group management.
The RdcMetricFetcherImpl.cc is added to fetch the metrics from
rocm_smi_lib. Currently, only support power, memory, GPU utilization,
temperature, GPU clock, total device and device name.
A new example field_value_example.cc is added to demo how to record
the fields and retrieve data from cache.
Change-Id: I57acfa048fe9b3d848e2d441e768b3a63ccae3f8
[ROCm/rdc commit: a5f063f8b3]
Bill(Shuzhou) Liu
7f7cf5c1db