selftest/bpf: Fix spelling mistake "SIGALARM" -> "SIGALRM"

There is a spelling mistake in an error message, fix it.

Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

Author: Colin Ian King

tools/testing/selftests/bpf/bench.c

@@ -242,7 +242,7 @@ static void setup_timer()
 	last_time_ns = get_time_ns();
 	err = sigaction(SIGALRM, &sigalarm_action, NULL);
 	if (err < 0) {
-		fprintf(stderr, "failed to install SIGALARM handler: %d\n", -errno);
+		fprintf(stderr, "failed to install SIGALRM handler: %d\n", -errno);
 		exit(1);
 	}
 	timer_settings.it_interval.tv_sec = 1;