sandbox/seccomp: unexport println wrapper

This is an implementation detail that was exported for the bwrap argument builder. The removal of that package allows it to be unexported.

Signed-off-by: Ophestra <cat@gensokyo.uk>

sandbox/seccomp/seccomp.go

@@ -7,6 +7,7 @@ package seccomp
 #include "seccomp-build.h"
 */
 import "C"
+
 import (
 	"errors"
 	"fmt"