change RTEMS definition of ALIGNBYTES

[Jeff Johnston]

Patch checked in.

-- Jeff J.

Joel Sherrill wrote:
> Hi,
>
> The definition of ALIGNBYTES for RTEMS was not strict
> enough.  If you use it to align a double or structure
> gcc wants to use "load two word" instructions
> (e.g. SPARC ldd), then you will get a fault.
> I saw this with a port of BSD ls to RTEMS.
>
> FWIW the linux version uses the sizeof(int) also.
> I don't know if it will potentially trip the same
> issue.
>
> Please apply.  Thanks.
>
> 2009-06-19  Joel Sherrill <joel.sherrill@oarcorp.com>
>
>    * libc/sys/rtems/machine/param.h: Change ALIGNBYTES
>    so it can point to an aligned structure or double.
>