libiconv for windres

[Nick Clifton]

Hi Kai,

> 2007-06-05  Kai Tietz  <Kai.Tietz@onevision.com>
> 
>         * binutils/Makefile.am: Add LIBICONV to windres.
>         * binutils/acinclude.m4: Added missing "lib-*.m4" and
>         "lt*.m4" files.
>         * binutils/configure.in: Add AC_CHECK_HEADER for
>         iconv.h and use AM_ICONV.
>         * binutils/config.in: Add ICONV defines.
>         * binutils/aclocal: Regenerate.
>         * binutils/confugure: Likewise.
>         * binutils/winduni.c: (local_iconv_map codepages,
>         wind_language_t languages, unicode_is_valid_codepage,
>         wind_find_language_by_id, wind_find_language_by_codepage,
>         wind_find_codepage_info, unicode_from_codepage,
>         codepage_from_unicode, iconv_onechar, wind_iconv_cp,
>         wind_MultiByteToWideChar wind_WideCharToMultiByte):
>         New.
>         (ascii_from_unicode): Use codepage_from_unicode.
>         (ascii_from_unicode): Use unicode_from_codepage.
>         Use for cygwin windows API for unicode transformation.
>         * binutils/winduni.h: (CP_ACP, CP_UTF7, CP_UTF8,
>         CP_OEM, CP_UTF16): New macros.
>         (wind_language_t, local_iconv_map): New types.
>         (wind_find_language_by_id, wind_find_language_by_codepage,
>         unicode_is_valid_codepage, wind_find_codepage_info,
>         unicode_from_codepage, codepage_from_unicode): New
>         prototypes.

Applied (with a few formatting tidy ups).

Cheers
   Nick