Mark dpkg and dselect as Multi-Arch foreign

Reported-by: Steve Langasek <vorlon@debian.org>

debian/control

@@ -30,6 +30,7 @@ Description: Debian package management static library
 
 Package: dpkg
 Architecture: any
+Multi-Arch: foreign
 Essential: yes
 Pre-Depends: ${shlibs:Depends}, tar (>= 1.23), xz-utils
 Depends: ${misc:Depends}
@@ -98,6 +99,7 @@ Description: Dpkg perl modules
 Package: dselect
 Priority: optional
 Architecture: any
+Multi-Arch: foreign
 Depends: ${shlibs:Depends}, dpkg (>= 1.13.1), ${misc:Depends}
 Suggests: perl
 Conflicts: dpkg-ftp, dpkg-multicd