Moving the gnupload script from automake to gnulib?

[Stefano Lattarini]

Hello Gnulibers.

I've recently noticed that the gnupload script present in the automake
repository is *not* synced from an external source like I thought, and
like is done for other maintainer-oriented scripts and files that are
not automake-specific (such as 'INSTALL', 'gitlog-to-changelog' or
'config.guess').  Since gnupload is not required by automake-generated
code (be it configure or Makefile content), and is not specifically
tied to automake in any way, I propose it to be instead moved to gnulib,
which already contains the master copy of similar generally-useful,
maintainer-oriented files (e.g., 'vc-list-files', 'update-copyright',
or the aforementioned 'gitlog-to-changelog').

If you agree, I can prepare a patch for both gnulib and automake to
implement the moving.  WDYT?

Regards,
  Stefano