Inconsistency in host fn arguments

If a host function is defined as `host_fn(val: int)` and this is called from rust PDK, the argument `val` isn't parsed correctly as in int. 

The value for val is treated Big Endian int while in reality it is actually a little endian. To accurately parse the value, one would need to set the type of val to bytes and parse it by ` int.from_bytes(sock_id, "little")` 