ash: fix redir_leak.tests if STANDALONE=y

If STANDALONE and we run a NOEXEC applet, saved copies of redirected fds
were visible for the child. They have CLOEXEC bit, yes, but we do not exec
in this case.

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

shell/ash.c

@@ -7698,6 +7698,7 @@ tryexec(IF_FEATURE_SH_STANDALONE(int applet_no,) char *cmd, char **argv, char **
 			clearenv();
 			while (*envp)
 				putenv(*envp++);
+			popredir(/*drop:*/ 1, /*restore:*/ 0);
 			run_applet_no_and_exit(applet_no, cmd, argv);
 		}
 		/* re-exec ourselves with the new arguments */