[source] ubus: update to the latest version, adds a race fix for wait_for

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/8869dd47ca8ca70213acf349abc263bd6ec4eed0

commit 8869dd47ca8ca70213acf349abc263bd6ec4eed0
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Oct 12 20:02:23 2016 +0200

    ubus: update to the latest version, adds a race fix for wait_for
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/system/ubus/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package/system/ubus/Makefile b/package/system/ubus/Makefile
index db93d50..b2352f4 100644
--- a/package/system/ubus/Makefile
+++ b/package/system/ubus/Makefile
@@ -1,15 +1,15 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ubus
-PKG_VERSION:=2016-08-23
+PKG_VERSION:=2016-10-12
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/ubus.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=686c05d738a7a1f7ec62c47807f07f6f642904b1
+PKG_SOURCE_VERSION:=312448a5b147c221836827a7a641e76a4514db44
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
-PKG_MIRROR_MD5SUM:=75d708d2f17f1b37dbe4ad4ab042e23d23535c895ac667639c5a5035018c5d66
+PKG_MIRROR_MD5SUM:=0d572863d46c9d6e89a573ed5db671f4eaff311df6fa5e8fa83b8f07e7dc928d
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=LGPL-2.1