base-files: add syslog logging for v function

The logging output should not only be displayed in the calling shell
session but also in the syslog. A sysupgrade and a configuration
import, export can thus be traced in the syslog.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

package/base-files/files/lib/upgrade/common.sh

@@ -71,6 +71,7 @@ _vn() {
 
 v() {
 	_v "$(date) upgrade: $@"
+	logger -p info -t upgrade "$@"
 }
 
 vn() {

package/base-files/files/lib/upgrade/stage2

@@ -45,7 +45,7 @@ switch_to_ramfs() {
 		mtd partx losetup mkfs.ext4 nandwrite flash_erase	\
 		ubiupdatevol ubiattach ubiblock ubiformat		\
 		ubidetach ubirsvol ubirmvol ubimkvol			\
-		snapshot snapshot_tool date				\
+		snapshot snapshot_tool date logger			\
 		$RAMFS_COPY_LOSETUP $RAMFS_COPY_LVM			\
 		$RAMFS_COPY_BIN
 	do