ABI document

[Florian Weimer]

* Vivek Das Mohapatra via Gnu-gabi:

> Right - I dropped Jakub a line last week and I haven't seen a response
> either way: Could someone with commit access apply the attached patches?

> [2. text/x-diff; 0001-Document-GNU-extensions-to-ELF-related-to-loading-an.patch]
> [3. text/x-diff; 0002-Add-prelink-documentation.patch]

I've applied these patches and added links to the overview page at:

  <https://sourceware.org/gnu-gabi/>

Thanks a lot for your contribution!

Florian