Fix copying of dotfiles in /

An Example is /.init_enable_core to enable coredumps

thanks to Snaps@#buildroot for the idea of solving this with rsync.

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Hi,

Thanks for your mail, such contributions are very welcome! However, here are a few comments:

- patches should be sent directly in the e-mail, not as attachment. If you use a version control system, you can easily sent e-mails directly from that (for example with git format-patch, hg email, ...)

- A patch should contain a clear description. I think the description is currently a bit short, it would be better if you explain the problem you are solving in more detail.

- A patch should contain a Signed-off-by line with your name and e-mail address, below the description. For example:

Could you resend the patch according to these rules?

Thanks,
Thomas
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