*: make exec failure message more consistent

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

selinux/runcon.c

@@ -133,6 +133,5 @@ int runcon_main(int argc UNUSED_PARAM, char **argv)
 				     context_str(con));
 
 	execvp(argv[0], argv);
-
 	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }