d/control: add dependency upon netbase

/etc/ethertypes is needed by ebtables-nft-* binaries and it's provided
by netbase (>= 6.0)

Closes: #946932
Signed-off-by: Alberto Molina Coballes <alb.molina@gmail.com>

debian/control

@@ -26,6 +26,7 @@ Architecture: linux-any
 Depends: libip4tc2 (=${binary:Version}),
          libip6tc2 (=${binary:Version}),
          libxtables12 (=${binary:Version}),
+         netbase (>= 6.0),
          ${misc:Depends},
          ${shlibs:Depends}
 Suggests: firewalld, kmod