debian build requires libdemangle, no libiberty on debian, ubuntu only

debian/control.in

@@ -1,7 +1,7 @@
 Source: mrw-c++
 Priority: extra
 Maintainer: Marc Wäckerlin (http://marc.waeckerlin.org) <marc@waeckerlin.org>
-Build-Depends: @DIST_BUILDDEPENDS@ debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, binutils-dev, libboost-thread-dev, zlib1g-dev, libiberty-dev
+Build-Depends: @DIST_BUILDDEPENDS@ debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, libiberty-dev | binutils-dev, libboost-thread-dev, zlib1g-dev
 Standards-Version: 3.8.1
 Section: libs
 Homepage: https://dev.marc.waeckerlin.org/projects/mrw-c++