[source] netifd: update to latest git HEAD

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/e622b307307856d284addc52e8172fdf66252d96

commit e622b307307856d284addc52e8172fdf66252d96
Author: John Crispin <john at phrozen.org>
AuthorDate: Tue Aug 22 09:12:56 2017 +0200

    netifd: update to latest git HEAD
    
    b5731bf allow setting rps/xps defualt values via uci
    2a29d1a system: remove unused 6rd tunnel attributes
    e627542 netifd: allow negative neighlocktime values
    e41382c system-linux: parse ipv6 specific tunnel settings as nested data json object
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 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 4602ba2..4cdfe9b 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:=2017-07-21
-PKG_SOURCE_VERSION:=34afb764077768a361d76256fb05cbba172de223
-PKG_MIRROR_HASH:=54b48cda9c8e28ce4785c00f4ca7782f2fa0672362a36de0860db04901f7e995
+PKG_SOURCE_DATE:=2017-08-22
+PKG_SOURCE_VERSION:=b5731bfbabaf7aab0fc47143bd6ad0b12cc3df0a
+PKG_MIRROR_HASH:=c2b9f61a1433c9ae8385e72cc648528a1c6d514da26180ec80dba61b07869095
 PKG_MAINTAINER:=Felix Fietkau <nbd at nbd.name>
 
 PKG_LICENSE:=GPL-2.0