ELF unexec: R_*_NONE relocs

ELF unexec: R_*_NONE relocs

Emacs should build on ppc64el.  A problem with the bss has been fixed.

This upstream patch has been added [6/10]:

  ELF unexec: R_*_NONE relocs

  These should be ignored on all targets.

  * unexelf.c (unexec): Ignore R_*_NONE relocs for any target,
  not just Alpha.  Comment on reloc size assumption.

Origin: upstream, commit: 8285c2ab8050de218c0c06182659ee0a7b23a0f6
Bug: http://debbugs.gnu.org/20614
Bug-Debian: http://bugs.debian.org/808347
Added-by: Rob Browning <rlb@defaultvalue.org>