configure: Get static libs for static linking
configure: Get static libs for static linking

So you wanna build libvirt-sandbox, right? And you think you have
everything you need. Dang, you don't! Because we check for libz
and liblzma for dynamic linking. However,
libvirt-sandbox-init-qemu is linked statically. Therefore, we
need to ask pkg-config to fetch us the list of libs for static
linking.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

agx/libvirt-sandbox-debian,libvirt/libvirt-sandbox,libvirt/libvirt-sandbox,agx/libvirt-sandbox-debian,agx/libvirt-sandbox-debian,agx/libvirt-sandbox-debian,libvirt/libvirt-sandbox,agx/libvirt-sandbox-debian