Revert accidental elf.c change

[Nick Clifton]

Hi Alan,

> Nick, was I correct in the above comment?  Two headers I agree with,
> but can't see why you need the third?
> 
> 	* elf.c (get_program_header_size): Revert accidental change.

Totally.  At one point whilst trying to get all of this ELF program
header correctness stuff to work, I was generating an extra slot.  But
that code did not work and I reverted it, but I forgot to reduce the
slot count.  Sorry.

Cheers
  Nick