2.36: windres tool broken; needs fix

[Nick Clifton]

Hi Thomas,

> the windres tool as changed in 2.36 breaks build processes, see https://sourceware.org/bugzilla/show_bug.cgi?id=27594 <https://sourceware.org/bugzilla/show_bug.cgi?id=27594>.
> As the bug has not yet been assigned or commented, I'd like to make sure this gets fixed for the next release please.

I am having a hard time understanding what, if anything, needs to be
changed for this PR.

I did check in a small patch to correct the description of the --preprocessor
option.  It should now make sense, and show that 'gcc' is the preprocessor and
-E, -xc-header and -DRC_INVOKED are preprocessor arguments.

Do you have an example of a failing windres invocation that properly uses
--preprocessor and --preprocessor-arg along with escaping relevant to the
shell that is going to interpret the command line ?

Cheers
   Nick