Enums and booleans require large type declaration for FFI

[bcelenza]

Example: socket close state

If represented as anything other than a u64, an invalid memory access error is throwing during validation of the BPF program.

vesper/probes/src/network/mod.rs

Line 36 in f178bf7

pub close_state: u64,

vesper/probes/src/network/mod.rs

Lines 5 to 9 in f178bf7

	#[derive(Copy, Clone)]
	pub enum SocketCloseState {
	FIN = 1,
	RST = 2,
	}

Some related info: foniod/redbpf#150, https://rust-lang.github.io/unsafe-code-guidelines/layout/enums.html

I'm probably just misunderstanding something trivial.