RFA; Add option to control combine-stack-adjustments pass

[Gerald Pfeifer]

On Tue, 19 Oct 2010, Nick Clifton wrote:
>> would you mind also describing this in
>> http://gcc.gnu.org/gcc-4.6/changes.html ?
> Is this patch OK ?

Looks good, there just seems to be a word missing around "before was 
enabled automatically"?

Thanks,
Gerald