[ECOS] Patch for x86 bootstrap

[elf@florence.buici.com]

I made a patch to the platform.inc code so that the x86 gdb stub can
boot from a device with geometry other than the default floppy
geometry.  It also changes the handling of the _start address such
that a) it can be aligned on any byte boundary, and b) it can be over
64k--for what it's worth.

  < ftp://ftp.buici.com/pub/ecos/bootstrap >

-- Marc Singer