Implement changes needed for Linux ELF binary format. This format,

Implement changes needed for Linux ELF binary format.  This format,
unlike the older a.out format, translates the data segment to begin at
0x08000000, and additionally changes the calling conventions so that
returned structures are allocated by the caller and passed in as
pointers.  We fix the first problem by extending the win32s segment
register manipulation to also be used with Linux ELF.  The second
problem is fixed by extending the OS/2 assembly-language patches to
also cover Linux ELF.