virtio-devices: seccomp: Add seccomp filters for virtio_vsock thread

This patch enables the seccomp filters for the virtio_vsock worker
thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>

virtio-devices/src/vsock/mod.rs

@@ -273,6 +273,7 @@ mod tests {
                     PathBuf::from("/test/sock"),
                     TestBackend::new(),
                     false,
+                    seccomp::SeccompAction::Trap,
                 )
                 .unwrap(),
             }