transmission: add init file STOP directive

Transmission should stop early on system shutdown to avoid
for example fstab unmount disks when transmission is writing.

Signed-off-by: Francesco G <gfrancesco@users.noreply.github.com>

net/transmission/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=transmission
 PKG_VERSION:=2.94
-PKG_RELEASE:=15
+PKG_RELEASE:=16
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GITHUB/transmission/transmission-releases/master

net/transmission/files/transmission.init

@@ -2,6 +2,7 @@
 # Copyright (C) 2010-2015 OpenWrt.org
 
 START=99
+STOP=10
 USE_PROCD=1
 PROG="/usr/bin/transmission-daemon"