pxeboot_ia32.bin works again. Thanks!

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

Follwing the commit logged here:

  http://mail-index.netbsd.org/source-changes/2014/05/01/msg054428.html

'pxeboot_ia32.bin' built with gcc48, etc. works again!  Thanks!

Interestingly, the resulting binary is exactly the same size as the
last working versions built with gcc 4.5.4 (also same size as from
netbsd-6).  Looking at the differences, they appear to be mostly
mechanical, so the size similarity is understandable.

Thanks again!

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