Fix a GObject registration problem on Debian
Fix a GObject registration problem on Debian

Do not link the static library with libfwupdprivate, instead do it in the
target executable.

Fixes https://github.com/hughsie/fwupd/issues/244

fwupd/fwupd,vathpela/fwupd,superm1/fwupd,hughsie/fwupd,vathpela/fwupd,superm1/fwupd,hughsie/fwupd,vathpela/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,superm1/fwupd,fwupd/fwupd,vathpela/fwupd