Fix __wasi_subscription_t structure definition inconsistent with wasi-libc definition issue, reported by #961, tested with sleep, poll API and other wasi cases on x86-64, x86-32 and arm32 targets.
Fix __wasi_subscription_t structure definition inconsistent with wasi-libc definition issue, reported by #961, tested with sleep, poll API and other wasi cases on x86-64, x86-32 and arm32 targets.