fix permission issue, /var/empty needs to have the right perms

git-svn-id: svn://svn.openwrt.org/openwrt/packages@8044 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/openssh/files/sshd.init

@@ -15,6 +15,7 @@ start() {
 		}
 	}; done
 	mkdir -p /var/empty
+	chmod 0700 /var/empty
 	/usr/sbin/sshd
 }