Revert "patches/openwrt: drop patch accepted by upstream"

This reverts commit 0d08bada.

This patch wasn't sent to upstream yet. That is an error.

patches/openwrt/to-upstream/0014-base-files-Make-sure-umount-doesn-t-break-on-restart.patch

+From 97cc8ee9224265835de28f7f9d3d934ac928229e Mon Sep 17 00:00:00 2001
+From: Michal Hrusecky <michal.hrusecky@nic.cz>
+Date: Mon, 3 Dec 2018 10:33:41 +0100
+Subject: [PATCH] base-files: Make sure umount doesn't break on restart
+
+Just to be on safe side, make sure that restart doesn't do anything when
+triggering umount init script.
+
+Signed-off-by: Michal Hrusecky <michal.hrusecky@nic.cz>
+---
+ package/base-files/files/etc/init.d/umount | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/package/base-files/files/etc/init.d/umount b/package/base-files/files/etc/init.d/umount
+index 349b2b3264..d930a4d48b 100755
+--- a/package/base-files/files/etc/init.d/umount
++++ b/package/base-files/files/etc/init.d/umount
+@@ -2,6 +2,11 @@
+ # Copyright (C) 2006 OpenWrt.org
+ 
+ STOP=99
++
++restart() {
++	:
++}
++
+ stop() {
+ 	sync
+ 	/bin/umount -a -d -r
+-- 
+2.19.2
+