[PATCH]: further shrinking of boot2

[Roman Divacky]

Hi all!

In an effort to help import clang3.5 I looked at squeezing a few more bytes
from boot2.


        http://rys.vlakno.cz/~rdivacky/boot2.diet.patch


Please test and review the patch. It survived my qemu boot attempt so it's
not completely broken. But I would like to have some more testing and review
comments before I move forward with this.

Fwiw, it shrinks boot2 by 16 bytes when compiled with clang34 and by 28 bytes
when compiled with clang35.

Thanks! Roman