create export libmicrohttpd.lib on W32 when building shared lib
use MS lib.exe if found or dlltool otherwise

git-svn-id: https://gnunet.org/svn/libmicrohttpd@32442 140774ce-b5e7-0310-ab8b-a85725594a96
create W32 static lib with MS lib.exe if available

git-svn-id: https://gnunet.org/svn/libmicrohttpd@32443 140774ce-b5e7-0310-ab8b-a85725594a96
add W32 dll information resources

git-svn-id: https://gnunet.org/svn/libmicrohttpd@32444 140774ce-b5e7-0310-ab8b-a85725594a96