[PATCH] readelf: add pretty printing for FDO Dlopen Metadata note

[Nick Clifton]

Hi Luca,

> Note that the webpage in the comment is not published yet,
> it will be next week when the next systemd RC is tagged.
> The document can be viewed right now on github at:
> https://github.com/systemd/systemd/blob/main/docs/ELF_DLOPEN_METADATA.md
> 
> But the node ID and the string format are now fixed, even
> if the content of the string might change, it will still be
> a string.

Approved - please apply.

Cheers
  Nick