bfd and cygpath

[NightStrike]

Building bfd in a particular cross compiler scenario requires that
cygpath be set to "echo".  bfd configury has the tools to do this, but
it's broken.  Configure properly does this:

# test whether we have cygpath
if test -z "$CYGPATH_W"; then
  if (cygpath --version) >/dev/null 2>/dev/null; then
    CYGPATH_W='cygpath -w'
  else
    CYGPATH_W=echo
  fi
fi

But then fails to actually use that variable where it counts:

      fix_srcfile_path='`cygpath -w "$srcfile"`'

and the subsequent build fails because of this.

I see this in the resultant configure, but I don't see how it is
getting into the bfd configure.  There is a similar gcc bug here:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56412

If it comes from libtool upstream, can somebody from binutils update
the libtool stuff?