[PATCH v2] Support powerpc64le-linux platform

[Torbjorn Granlund]

"Ulrich Weigand" <uweigand at de.ibm.com> writes:

  Ah, I hadn't realized that some of the 32-bit targets actually
  use files under powerpc64/, but still an .m4 file in powerpc32/.
  
It is not a very good design.  (I have some plans of reorganising the
mpn subdir to have powerpc, powerpc/32, powerpc/64 and similar for other
archs.  That would allow cleaner code sharing.)

  I guess this means the relevant .m4 files in powerpc32 also
  need to accept and ignore the second PROLOGUE_cpu argument.

  As far as I can see, this affects only elf.m4 and darwin.m4.
  Fixed by the patch below.
  
  Tested using
     ABI=mode32 ../gmp/configure --host=power6-unknown-linux-gnu
  which is one of the configurations that failed before the patch.
  
Thanks for taking care if this.  The change should momentarily appear at
the public repo.


Torbjörn
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