*: make exec failure message more consistent

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/setsid.c

@@ -44,6 +44,7 @@ int setsid_main(int argc UNUSED_PARAM, char **argv)
 		setsid();
 	}
 
-	BB_EXECVP(argv[1], argv + 1);
-	bb_simple_perror_msg_and_die(argv[1]);
+	argv++;
+	BB_EXECVP(argv[0], argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }