libgfortran patch for PR target/23556 (strict alignment fix)

[Steve Ellcey]

> > Tested on HPPA 32 and 64 bits and on IA64 HP-UX and Linux.
> > 
> > OK for checkin?
> 
> OK for both mainline and 4.0 (assuming you tested it on both).

I didn't test it on the 4.0 branch, I will do so and then checking it in
there after testing.

> The same problem also occurs in set_integer.  The identical fix
> would qualify as obvious after committing this one.

OK, I will do this too.

Steve Ellcey
sje@cup.hp.com