perf evlist: Close fds on destructor

Since it is safe to call perf_evlist__close() multiple times, autoclose
it and remove the calls to the close from existing tools, reducing the
tooling boilerplate.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2kq9v7p1rude1tqxa0aue2tk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index fdeb2aa..5511a0a 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -89,7 +89,7 @@
 	if (perf_evlist__mmap(evlist, 128, true) < 0) {
 		pr_debug("failed to mmap events: %d (%s)\n", errno,
 			 strerror(errno));
-		goto out_close_evlist;
+		goto out_delete_evlist;
 	}
 
 	perf_evlist__start_workload(evlist);
@@ -113,8 +113,6 @@
 	}
 
 	perf_evlist__munmap(evlist);
-out_close_evlist:
-	perf_evlist__close(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 	return err;