The B-D-A header doesn't make any sense without Architecture:any packages to be built. Move them to B-D-I.

debian/changelog

@@ -1,3 +1,10 @@
+multistrap (2.2.3) UNRELEASED; urgency=medium
+
+  * The B-D-A header doesn't make any sense without Architecture:any packages
+    to be built. Move them to B-D-I.
+
+ -- Johannes Schauer <josch@debian.org>  Sat, 03 Dec 2016 22:54:08 +0100
+
 multistrap (2.2.2) unstable; urgency=medium
 
   * New maintainer (Closes: #835909)

debian/control

@@ -4,8 +4,7 @@ Priority: optional
 Maintainer: Johannes Schauer <josch@debian.org>
 Uploaders: Wookey <wookey@debian.org>, Neil Williams <codehelp@debian.org>
 Build-Depends: debhelper (>= 10)
-Build-Depends-Arch: po4a (>= 0.37.1), bash-completion
-Build-Depends-Indep: intltool
+Build-Depends-Indep: intltool, po4a (>= 0.37.1), bash-completion
 Standards-Version: 3.9.6
 Vcs-Browser: https://browse.dgit.debian.org/multistrap.git/
 Vcs-Git: https://git.dgit.debian.org/multistrap