jobclient: bugfix: initialize timing statistics

If we don't properly initialize the job timing statistics, the number
of jobs to be requested in the second request to the server is based
on the wrong timings.  In our test case, CLIENT_JOB_LIMIT jobs were
requested at once.

Change-Id: I7e9d8ab6fe14e4488b3a74baf061d9a07f3a77c4

src/core/efw/JobClient.cc

@@ -19,6 +19,8 @@ JobClient::JobClient(const std::string& server, int port)
 	}
 	srand(time(NULL)); // needed for random backoff (see connectToServer)
 	m_server_runid = 0; // server accepts this for virgin clients
+	m_job_total = 0;
+	m_job_runtime_total = 0;
 	m_job_throughput = 1; // client gets only one job at the first request
 }