make_ext4fs: insert lost+found directory into filled filesystems

Insert a lost+found directory if necessary when creating a filesystem
based on a directory structure.  This will make the resulting image
clean when tested with e2fsck, allowing e2fsck to be run on all images
as a validity test.

Change-Id: I81d0b6b4a802713270d3469e5a3bc555b680ec7e
1 file changed