runc version: don't use seccomp.IsEnabled

As pointed out to in [1], seccomp.IsEnabled does some runtime checks,
while here (when printing libseccomp version) we should merely print
the version number of libseccomp, if compiled in.

Change the code to check if the version is non-zero (as seccomp.Version
returns 0, 0, 0 in case seccomp is not compiled in.

[1] https://github.com/opencontainers/runc/pull/2866

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

main.go

@@ -64,8 +64,9 @@ func main() {
 	}
 	v = append(v, "spec: "+specs.Version)
 	v = append(v, "go: "+runtime.Version())
-	if seccomp.IsEnabled() {
-		major, minor, micro := seccomp.Version()
+
+	major, minor, micro := seccomp.Version()
+	if major+minor+micro > 0 {
 		v = append(v, fmt.Sprintf("libseccomp: %d.%d.%d", major, minor, micro))
 	}
 	app.Version = strings.Join(v, "\n")