Move B-D on po4a to Build-Depends-Arch (it's not needed for the clean target)

debian/changelog

@@ -2,6 +2,8 @@ multistrap (2.2.2) UNRELEASED; urgency=medium
 
   * New maintainer (Closes: #835909)
   * Move development to dgit
+  * Move B-D on po4a to Build-Depends-Arch (it's not needed for the clean
+    target)
 
  -- Johannes Schauer <josch@debian.org>  Fri, 02 Dec 2016 23:25:07 +0100
 

debian/control

@@ -3,7 +3,8 @@ Section: utils
 Priority: optional
 Maintainer: Johannes Schauer <josch@debian.org>
 Uploaders: Wookey <wookey@debian.org>, Neil Williams <codehelp@debian.org>
-Build-Depends: cdbs, debhelper (>= 7), po4a (>= 0.37.1)
+Build-Depends: cdbs, debhelper (>= 7)
+Build-Depends-Arch: po4a (>= 0.37.1)
 Build-Depends-Indep: intltool
 Standards-Version: 3.9.6
 Vcs-Browser: https://browse.dgit.debian.org/multistrap.git/