Fix missing vendor dir

vendor/github.com/tklauser/go-sysconf/sysconf_unsupported.go

@@ -0,0 +1,16 @@
+// Copyright 2021 Tobias Klauser. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris
+
+package sysconf
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func sysconf(name int) (int64, error) {
+	return -1, fmt.Errorf("unsupported on %s", runtime.GOOS)
+}