perf bench: Fix two memory leaks detected with ASan

ASan reports memory leaks while running:

  $ perf bench sched all

Fixes: e27454cc ("perf bench: Add sched-messaging.c: Benchmark for scheduler and IPC mechanisms based on hackbench")
Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Russel <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pierre Gondois <pierre.gondois@arm.com>
Link: http://lore.kernel.org/lkml/20211110022012.16620-1-sohaib.amhmd@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/bench/sched-messaging.c

@@ -223,6 +223,8 @@ static unsigned int group(pthread_t *pth,
 		snd_ctx->out_fds[i] = fds[1];
 		if (!thread_mode)
 			close(fds[0]);
+
+		free(ctx);
 	}
 
 	/* Now we have all the fds, fork the senders */
@@ -239,6 +241,8 @@ static unsigned int group(pthread_t *pth,
 		for (i = 0; i < num_fds; i++)
 			close(snd_ctx->out_fds[i]);
 
+	free(snd_ctx);
+
 	/* Return number of children to reap */
 	return num_fds * 2;
 }