std: relocate seccomp lookup tables

This should enable resolving NativeRule in hst.

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

container/seccomp/presets_test.go

@@ -0,0 +1,30 @@
+package seccomp_test
+
+import (
+	"crypto/sha512"
+	"encoding/hex"
+
+	"hakurei.app/container/seccomp"
+	"hakurei.app/container/std"
+)
+
+type (
+	bpfPreset = struct {
+		seccomp.ExportFlag
+		std.FilterPreset
+	}
+	bpfLookup map[bpfPreset][sha512.Size]byte
+)
+
+func toHash(s string) [sha512.Size]byte {
+	if len(s) != sha512.Size*2 {
+		panic("bad sha512 string length")
+	}
+	if v, err := hex.DecodeString(s); err != nil {
+		panic(err.Error())
+	} else if len(v) != sha512.Size {
+		panic("unreachable")
+	} else {
+		return ([sha512.Size]byte)(v)
+	}
+}