change from /jffs to /overlay, patch from Daniel Dickinson

SVN-Revision: 20356

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

@@ -35,7 +35,7 @@ install_bin() { # <file> [ <symlink> ... ]
 
 pivot() { # <new_root> <old_root>
 	mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
-	mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
+	mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/overlay && \
 	mount -o move /proc $1/proc && \
 	pivot_root $1 $1$2 || {
         umount $1 $1
@@ -43,7 +43,7 @@ pivot() { # <new_root> <old_root>
 	}
 	mount -o move $2/dev /dev
 	mount -o move $2/tmp /tmp
-	mount -o move $2/jffs /jffs 2>&-
+	mount -o move $2/overlay /overlay 2>&-
 	return 0
 }
 
@@ -63,9 +63,9 @@ run_ramfs() { # <command> [...]
 	mount -o remount,ro /mnt
 	umount -l /mnt
 
-	grep /jffs /proc/mounts > /dev/null && {
-		mount -o remount,ro /jffs
-		umount -l /jffs
+	grep /overlay /proc/mounts > /dev/null && {
+		mount -o remount,ro /overlay
+		umount -l /overlay
 	}
 
 	# spawn a new shell from ramdisk to reduce the probability of cache issues