[PATCH v2] Add scripts/move-symbol-to-libc.py

[Florian Weimer]

* Florian Weimer:

> This helper script can be used to move symbols to libc.abilist across
> all architectures, while preserving their symbol version.

Ping.  This patch still needs review:

  <https://sourceware.org/pipermail/libc-alpha/2020-May/113995.html>

Thanks,
Florian