perf tools: Add missing break for PERF_RECORD_ITRACE_START

Missing switch break since introduction of new event:

  c4937a91 perf tools: handle PERF_RECORD_LOST_SAMPLES

Also removing unneeded break for PERF_RECORD_LOST_SAMPLES.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150629112745.GA21507@krava.brq.redhat.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/machine.c

@@ -1448,10 +1448,9 @@ int machine__process_event(struct machine *machine, union perf_event *event,
 	case PERF_RECORD_AUX:
 		ret = machine__process_aux_event(machine, event); break;
 	case PERF_RECORD_ITRACE_START:
-		ret = machine__process_itrace_start_event(machine, event);
+		ret = machine__process_itrace_start_event(machine, event); break;
 	case PERF_RECORD_LOST_SAMPLES:
 		ret = machine__process_lost_samples_event(machine, event, sample); break;
-		break;
 	default:
 		ret = -1;
 		break;