d/control: turn iptables-dev Architecture: any

The affected packages cannot satisfy their cross build dependencies,
because their dependency on iptables-dev is unsatisfiable. In general,
Architecture: all packages can never satisfy cross build dependencies
unless marked Multi-Arch: foreign. In this case, such a marking would be
fatal, as it masks out the architecture constraint. Those packages would
be requesting iptables headers for the host architecture and receiving
them for the build architecture. Thus iptables-dev needs to be switched
to Architecture: any.

Alternatively, all those affected packages need to switch their dependency
to the real packages and iptables-dev should be removed.

Closes: #865464
Signed-off-by: Helmut Grohne <helmutg@debian.org>
Signed-off-by: Arturo Borrero Gonzalez <arturo@debian.org>

debian/control

@@ -43,7 +43,8 @@ Depends: libip4tc-dev (>= ${source:Version}),
          libiptc-dev (>= ${source:Version}),
          libxtables-dev (>= ${source:Version}),
          ${misc:Depends}
-Architecture: all
+Architecture: any
+Multi-Arch: same
 Priority: extra
 Section: oldlibs
 Description: transitional dummy package