Patch to prevent the build or use of GNU ld on AIX platforms

[Jeffrey A Law]

  In message < 199908241454.PAA12419@pathia.cygnus.co.uk >you write:
  > Hi Guys,
  > 
  >   I would like to submit the following patch for approval.  It
  >   disables the configure, build (and hence use) of GNU ld on AIX
  >   platforms, since it is known to be broken.  The definition of
  >   use_gnu_ld=no does not appear to be enough to prevent some tools (eg
  >   GDB) from using GNU ld.
It occurs to me you might want to put this into the binutils tree instead of
waiting and hoping that it propagates from the gcc into the binutils tree
over time :-)

jeff