There are some changes here that make the file metadata better match
the layer files:
* Set the mode of the file after the chown, as otherwise the per-group/uid
specific flags and e.g. sticky bit is lost
* Use lchown instead of chown
* Delay mtime updates to after all other changes so that later file
creation doesn't change the mtime for the parent directory
* Use Futimes in combination with O_PATH|O_NOFOLLOW to set mtime on symlinks
Upstream-commit: 99c7d129f422b488f478bc7887f37003dacc83e6
Component: engine
5f068e31ed