Fix pre-checkin.sh format and add missing function

OBS-URL: https://build.opensuse.org/package/show/Virtualization:Appliances:Images:openSUSE-Tumbleweed/livecd-openSUSE?expand=0&rev=20

livecd-tumbleweed-xfce.kiwi

@@ -51,7 +51,6 @@
     <package name="live-langset-data"/>
     <package name="live-add-yast-repos"/>
     <archive name="livecd-udev.tar.xz"/>
-    <archive name="xfce-changecontrolxml.tar.xz"/>
     
     <!-- list-common.sh -->
     <package name="aaa_base" replaces="gutenprint"/>
@@ -359,6 +358,7 @@
     <package name="aaa_base" replaces="fprintd"/>
     <ignore name="fprintd"/>
     <package name="libxslt-tools"/>
+    <archive name="xfce-changecontrolxml.tar.xz"/>
     <package name="aaa_base" replaces="sound-juicer"/>
     <ignore name="sound-juicer"/>
     <package name="aaa_base" replaces="remmina"/>

pre-checkin.sh

@@ -26,6 +26,10 @@ installPattern() {
 	PACKAGES="$PACKAGES\n    <namedCollection name=\"$1\"/>"
 }
 
+archive() {
+	PACKAGES="$PACKAGES\n    <archive name=\"$1\"/>"
+}
+
 for distro in leap tumbleweed; do
 	distroname="openSUSE Tumbleweed"
 	if [ "${distro}" = "leap" ]; then