bug#41242: Port feature/native-comp to Windows

[Nicolas Bértolo]

> As you said the problem is to decide who has the duty to remove the file
> at last.  If each Emacs deposes a file says .foo.eln-pidxxx for the
> whole time is using foo.eln should be easy for the last Emacs to
> understand it is really the last and has to do the clean-up in the case
> foo.eln was renamed in foo.eln*whatever

That file would be create when opening foo.eln, but when
Emacs is closing we don't know what file it refers to:
- foo.eln
- foo.eln.old
- foo.eln.old2
- foo.eln.oldN

These last files could be created if foo.eln.old exists at the time of renaming.