libubox: update to latest version, adds some helper function

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36907 3c298f89-4303-0410-b956-a3cf2f4a3e73
uci: update to latest version, adds uci<->blobmsg conversion code from netifd

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36908 3c298f89-4303-0410-b956-a3cf2f4a3e73
netifd: update to latest version, uses the new uci/blob code from libuci

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36909 3c298f89-4303-0410-b956-a3cf2f4a3e73