ubus: update to the latest version

Adds uloop related libubus fixes

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/system/ubus/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/ubus.git
-PKG_SOURCE_DATE:=2017-01-19
-PKG_SOURCE_VERSION:=97ac89f9727d4fae1b2d63d2fc3b59e0d5d4bf65
-PKG_MIRROR_HASH:=1dc6afd3baedc1cc6f4373a34b6d73975358e9741c647b358b4fdd5a72a07756
+PKG_SOURCE_DATE:=2017-01-22
+PKG_SOURCE_VERSION:=6f4e11e1db399074273944329883f9c35e7daef6
+PKG_MIRROR_HASH:=4b80cf4ff8fa0e103d6626014404c031a9e886b8fbc422fb65a9c36b3b787585
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=LGPL-2.1