Fix a ppc64el, bss-related build problem

Fix a ppc64el, bss-related build problem

Builds on ppc64el were failing like this:

  emacs: Program segment above .bss in
  /«BUILDDIR»/emacs24-24.5+1/debian/build-x/src/temacs

Add these upstream patches to fix the problem:

  0010-ELF-unexec-Correct-section-header-index.patch
  0011-ELF-unexec-Tidy-code.patch
  0012-ELF-unexec-Merge-Alpha-and-MIPS-COFF-debug-handling.patch
  0013-ELF-unexec-Symbol-table-patching.patch
  0014-ELF-unexec-_OBJC_-symbols-in-bss-sections.patch
  0015-ELF-unexec-R_-_NONE-relocs.patch
  0016-ELF-unexec-Drive-from-PT_LOAD-header-rather-than-sec.patch
  0017-ELF-unexec-Don-t-insert-a-new-section.patch
  0018-src-unexelf.c-NEW_PROGRAM_H-Remove-unused-macro-Bug-.patch
  0019-ELF-unexec-align-section-header.patch

Thanks to Paul Eggert <eggert@cs.ucla.edu> for help locating the set
of patches, and Esa Peuha <esa.peuha@gmail.com> for reporting the
problem.

Closes: 808347