samba4: update to version 4.12.7

Note:
Fixes CVE-2020-1472 in case smb.conf
contains 'server schannel = no' or 'server schannel = auto'

Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>

net/samba4/Makefile

@@ -2,7 +2,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=samba
-PKG_VERSION:=4.12.6
+PKG_VERSION:=4.12.7
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
@@ -13,7 +13,7 @@ PKG_SOURCE_URL:= \
 		http://www.nic.funet.fi/index/samba/pub/samba/stable/ \
 		http://samba.mirror.bit.nl/samba/ftp/stable/ \
 		https://download.samba.org/pub/samba/stable/
-PKG_HASH:=02289bb5e5538780e7b1d1cf6f040195cc75ea229dc28a9a1cb16a0608af6cec
+PKG_HASH:=30556a0dd2f9ab3b251eb9db6132ffd4379c159f574366fc2f2eabbc018c6fd2
 
 PKG_MAINTAINER:=Andy Walsh <andy.walsh44+github@gmail.com>
 PKG_LICENSE:=GPL-3.0-only