ubus: update to latest git HEAD

Signed-off-by: John Crispin <john@phrozen.org>

package/system/ubus/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ubus
-PKG_VERSION:=2016-01-26
+PKG_VERSION:=2016-06-01
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(OPENWRT_GIT)/project/ubus.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=619f3a160de4f417226b69039538882787b3811c
+PKG_SOURCE_VERSION:=96ab0b3032f5caf443162f38073403a372b3e1c1
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MIRROR_MD5SUM:=
 CMAKE_INSTALL:=1