x86: Expand FFI_GO_CLOSURE
x86: Expand FFI_GO_CLOSURE

If we're going to have to hand-write unwind info for darwin,
these macros make the job harder.

Pan7/libffi,plicease/libffi,s1341/libffi,Distrotech/libffi,joshtriplett/libffi,joshtriplett/libffi,biosbits/libffi,bgarrels/libffi,Distrotech/libffi,Pan7/libffi,Distrotech/libffi,nmav/libffi,biosbits/libffi,rth7680/libffi,nmav/libffi,joshtriplett/libffi,nmav/libffi,Pan7/libffi,bgarrels/libffi,joshtriplett/libffi,nmav/libffi,rth7680/libffi,rth7680/libffi,s1341/libffi,biosbits/libffi,biosbits/libffi,bgarrels/libffi,s1341/libffi,s1341/libffi,plicease/libffi,plicease/libffi,plicease/libffi,Pan7/libffi,bgarrels/libffi,rth7680/libffi,Distrotech/libffi