[patch binutils]: Add --preprocessor-arg option to windres tool

[Nick Clifton]

Hi Kai,

> This patch adds feature to windres tool, so that user can pass via
> --preprocessor-arg additional options to the preprocessor.

> 2011-04-08  Kai Tietz
>
> 	* windres.c (usage): Add new --preprocessor-arg option.
> 	(option_values): Add new OPTION_PREPROCESSOR_ARG enumerator.
> 	(option long_options): Add preprocessor-arg option.
> 	(main): Handle it.

The patch itself is OK, but you need to extend it.  In particular:

   * Document the new option in binutils/binutils.texi.

   * Mention the new feature in binutils/NEWS.

   * Optional, but very helpful: Add a test to 
binutils/testsuite/binutils-all/windres to check that the new feature works.

Cheers
   Nick