Makefile: install-netvm shouldn't be a dependency of itself.

Makefile

@@ -386,6 +386,6 @@ install-deb: install-common install-systemd install-systemd-dropins install-syst
 
 install-corevm: install-rh install-common install-systemd install-sysvinit install-systemd-dropins install-networking
 
-install-netvm: install-systemd-networking-dropins install-networkmanager install-netvm
+install-netvm: install-systemd-networking-dropins install-networkmanager
 
 install-vm: install-corevm install-netvm