Makefile: explictly link with all shared libraries
linking with libuci means we need to link with libblobmsg_json, libjson-c and
libubox. Sinc e we do not use pkg-config or something equivalent, we need to
specify all dependencies.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Florian Fainelli