[PATCH/RFA] Generic OS ABI handling

[Andrew Cagney]

> Okay, here we go.. This has the includes cleaned up as suggested.  This
> patch also includes the changes for SH (already approved by Elena),
> ARM (Richard?  Does this patch look okay to you?), Alpha (maintainerless,
> but it looks okay to me :-), and MIPS (HI ANDREW :-)

I'm ok with the MIPS part  - it checks both elf_flags and osabi. (just 
check Eli).

Andrew