[source] netifd: update to latest git HEAD

[LEDE Commits]

dedeckeh pushed a commit to source.git, branch master:
https://git.lede-project.org/7f029c3924a962624a61f6989531f777846d6a89

commit 7f029c3924a962624a61f6989531f777846d6a89
Author: Hans Dedecker <dedeckeh at gmail.com>
AuthorDate: Fri Dec 15 17:40:00 2017 +0100

    netifd: update to latest git HEAD
    
    4268193 interface-ip: harden eui64 IPv6 prefix address generation
    81ff6d1 interface-ip: fix race condition in IPv6 prefix address generation
    d3a5df0 handler: replace is_error() helper with NULL check
    
    Signed-off-by: Hans Dedecker <dedeckeh at gmail.com>
---
 package/network/config/netifd/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package/network/config/netifd/Makefile b/package/network/config/netifd/Makefile
index 80372cb..253b342 100644
--- a/package/network/config/netifd/Makefile
+++ b/package/network/config/netifd/Makefile
@@ -5,9 +5,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/netifd.git
-PKG_SOURCE_DATE:=2017-11-17
-PKG_SOURCE_VERSION:=c92106e3048ae10cb04a7c7303ba5f53bc057953
-PKG_MIRROR_HASH:=12e76a1dc17e7a4467814b4ad00041f0df2e599c555eaaf6cf93798c3dd50ee1
+PKG_SOURCE_DATE:=2017-12-15
+PKG_SOURCE_VERSION:=4268193c90bdd1532ee0555dd109a43eb8524b04
+PKG_MIRROR_HASH:=4f577ed5838ed9e33cc8c263198bc2b1d4f222e8259a2bbae367d67b10705a9e
 PKG_MAINTAINER:=Felix Fietkau <nbd at nbd.name>
 
 PKG_LICENSE:=GPL-2.0