[win32] update

Quick repack of @wsoltys-prepared packages.
This will work, but I don't like the result: 
* introduced third iconv.dll (we already have one iconv for VC-compiled code and one iconv for MinGW libs)
* introduced zlib.dll with conflicting version (we already have zlib.dll with same name but later version)

And may be it's better to use them as static libs instead of .dll