[patch] improve handling of ms_struct

[Devang Patel]

Eric Christopher wrote:
> The ms_struct attribute is, I believe, supposed to be for layout out 
> structures as close to the MS layout as we can. It turns out that it's 
> not just the bitfield packing, but the rest of the structure layout 
> and alignment as well.
>
> Here's a brief description of the layout:
This should be added into appropriate .texi docs (if it is not already 
described). Did you forget to include test cases ?

-
Devang