Revert "Revert "FROMLIST: overlayfs: handle XATTR_NOSECURITY flag for get xattr method""

This reverts commit 4e35d38c which was
commit ba11202b.

It should now all be good...

Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 133515582
Bug: 136124883
Bug: 129319403
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>