Some softwares insisted on have some manifest in top-level directory,
like package.xml for php packages. Some other packages was zipped on
macOS, which will insert some macOS metadata files into zoom.
See-also: dc73556cf3 and its parents.
See-also: 94fe74e506
Those files doesn't justify the need of adding a layer automatically
in extraction step.
Let's move them up.
9371fe8339