[patch] Change inline asm to work with llvm-gcc

[Rafael Espindola]

> What you find reasoanble on it?

Just that it requires a very minimal code change and that __FD_SET was
the only case I found in a very large code base. I haven't looked at
what llvm does with this information. It is probably pointless to do
so now.

Cheers,
-- 
Rafael Avila de Espindola

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