cygwin ld import library issue fix (removing unused "_nm_" symbols)

[Jim]

>
> You may dream all you like, but "portable" means "works on all the
> systems we support".  We cannot control the systems.  We can control
> our sources.  Portability precludes //-style comments in binutils.

Well - personally I thought you had gcc to support all your platforms, which
for ages has supported either style of comment... there's only a few relics
I've run across which were barely even functional as compilers that didn't
support it :)