check for dpkg-architecture on Debian and Ubuntu hosts, otherwise python2 host zlib module isn't build

scripts/scan-pkgs.sh

@@ -19,10 +19,17 @@ test -z "$BASH_VERSION$KSH_VERSION" && exec $BASH $0 "$@"
 [[ -n $BASH_VERSION ]] && shopt -s extglob
 topdir=$(readlink -nf $(dirname $0)/.. 2>/dev/null || (cd $(dirname $0)/..; pwd -P))
 OStype=$(uname)
+isdeb=$(uname -a|grep '\(Debian\|Ubuntu\)')
 out=0
 
 . $topdir/.config
 
+if [ $isdeb -eq 0 ];then
+	if [[ -n $ADK_COMPILE_PYTHON2 ]]; then
+		NEED_DPKG_ARCHITECTURE="$NEED_DPKG_ARCHITECTURE python2"
+	fi
+fi
+
 if [[ -n $ADK_NATIVE ]];then
 	if [[ -n $ADK_PACKAGE_NEON ]];then
 		NEED_LIBXML2_DEV="$NEED_LIBXML2_DEV neon"
@@ -490,6 +497,13 @@ if [[ -n $NEED_MAKEDEPEND ]]; then
 	fi
 fi
 
+if [[ -n $NEED_DPKG_ARCHITECTURE ]]; then
+	if ! which dpkg-architecture >/dev/null 2>&1; then
+		echo >&2 You need dpkg-architecture to build $NEED_DPKG_ARCHITECTURE
+		out=1
+	fi
+fi
+
 if [[ -n $ADK_USE_CCACHE ]]; then
         if ! which ccache >/dev/null 2>&1; then
                 echo >&2 You have selected to build with ccache, but ccache could not be found.