ROCProfV3: fatal message if PC sampling unsupported, but requested (#60)

If a user requests PC sampling on a system that does not support this feature,
report a fatal error message and stop executing the program.

source/lib/rocprofiler-sdk-tool/tool.cpp

@@ -1334,7 +1334,7 @@ tool_init(rocprofiler_client_finalize_t fini_func, void* tool_data)
             }
         }
         if(!config_match_found)
-            ROCP_ERROR << "Given PC sampling configuration is not supported on any of the agents";
+            ROCP_FATAL << "Given PC sampling configuration is not supported on any of the agents";
     }
 
     for(auto itr : get_buffers().as_array())