v2/guest/syscall: Do not export `syscall::ClockGettime`
This ensures we can implement `clock_gettime` from within
`guest::Handler::execute` without risk of including the syscall for
batches where `clock_gettime` is already present.
@@ -27,7 +27,7 @@ pub mod types;
pub use accept::*;
pub use accept4::*;
pub use bind::*;
-pub use clock_gettime::*;
+pub(crate) use clock_gettime::*;
pub use connect::*;
pub use fcntl::Fcntl;
pub use fstat::*;
