um add modernc/sqlite

vendor/modernc.org/libc/fsync.go

@@ -0,0 +1,10 @@
+// Copyright 2020 The Libc Authors. 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 !libc.nofsync
+// +build !libc.nofsync
+
+package libc // import "modernc.org/libc"
+
+const noFsync = false