fastd: needs host-bison and host-pkgconf

Fixes (missing host-bison):
http://autobuild.buildroot.net/results/237/2371c98112a416f4d9d32576f207dad8d80ac537



host-pkgconf derived from $(@D)/cmake/deps.cmake

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: Alexander Dahl <post@lespocky.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>