[source] libubox: update to the latest version, adds a few utility functions

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=11d47e615bedd77d9e8b27361efa1572ff3f2298

commit 11d47e615bedd77d9e8b27361efa1572ff3f2298
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Fri Jul 29 14:06:08 2016 +0200

    libubox: update to the latest version, adds a few utility functions
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/libs/libubox/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package/libs/libubox/Makefile b/package/libs/libubox/Makefile
index 424e077..b3a065d 100644
--- a/package/libs/libubox/Makefile
+++ b/package/libs/libubox/Makefile
@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libubox
-PKG_VERSION:=2016-07-04
+PKG_VERSION:=2016-07-29
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/libubox.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=d3fa561e5abcc88e02eb289c24d0b1d4d05adb54
+PKG_SOURCE_VERSION:=290c64ef5b5c3e75be851594f269d6a9568e64e5
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MIRROR_MD5SUM:=
 CMAKE_INSTALL:=1