remove ipkg list file before creating a new one (for squashfs)

SVN-Revision: 614

openwrt/target/default/target_skeleton/bin/ipkg

@@ -874,6 +874,7 @@ diff -u $dest/$conffile $IPKG_TMP/$pkg/data/$conffile"
 	(cd $IPKG_TMP/$pkg/data/; tar cf - . | (cd $owd; cd $dest; tar xf -))
 	rm -rf $IPKG_TMP/$pkg/data
 	rmdir $IPKG_TMP/$pkg
+	rm -f $info_dir/$pkg.list
 	$pkg_extract_stdout $filename ./data.tar.gz | tar tzf - | sed -e 's/^\.//' > $info_dir/$pkg.list
 
 	if [ -x "$info_dir/$pkg.postinst" ]; then