patchelf apparently needs extensive changes to work on ARM

[Mark H Weaver]

Upstream 'patchelf' doesn't work on ARM.
Here's the upstream bug report:

  https://github.com/NixOS/patchelf/issues/8

I had to apply a rather large patch from a fork
of 'patchelf' to get it working:

  
https://github.com/sriemer/patchelf/commit/0a96239cea6b97b9a0fff80da576e58ca2dfb2a2

For now, I've applied this patch on the 'wip-armhf' branch in commit
8de9362f3.  If anyone has a better suggestion, I'm all ears.

     Mark