* libffi/include/ffi.h.in: Define X86 instead of X86_64 in 32
	bit mode.
	* libffi/src/x86/ffi.c (ffi_closure_SYSV, ffi_closure_raw_SYSV):
	Receive closure pointer through parameter, read args using
	__builtin_dwarf_cfa.
	(FFI_INIT_TRAMPOLINE): Send closure reference through eax.

From-SVN: r64663