Replace libjson by jsoncpp for C++ dependency which was wrongly added by commit74fc60a267Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> (cherry picked from commitf23129ee1e) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>