* ltconfig.in: new config.guess returns *-*-cygwin now instead of

* ltconfig.in: new config.guess returns *-*-cygwin now instead of
*-*-cygwin32.  sed -e 's%(cygwin|mingw)32%1%g' ltconfig.in
* ltmain.in:   sed -e 's%(cygwin|mingw)32%1%g' ltmain.in

* ltconfig.in (hardcode_libdir_flag_spec, allow_undefined_flag,
archive_cmds, archive_sym_cmds, old_archive_from_new_cmds):
removed duplication of config by assuming that `test $with_gcc =
yes' implies gnu ld, otherwise MSVC++ (which I haven't tested
since I inheritted the code from Ian Lance Taylor btw!) is implied.