Adding upstream version 1.37.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

addport.go

@@ -0,0 +1,64 @@
+// Copyright 2022 The Sqlite 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 ignore
+// +build ignore
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func fail(rc int, msg string, args ...interface{}) {
+	fmt.Fprintf(os.Stderr, msg, args...)
+	os.Exit(rc)
+}
+
+func main() {
+	if len(os.Args) != 3 {
+		fail(1, "expected 2 args: pattern and replacement\n")
+	}
+
+	pattern := os.Args[1]
+	replacement := os.Args[2]
+	if err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			return nil
+		}
+
+		dir, file := filepath.Split(path)
+		if x := strings.Index(file, pattern); x >= 0 {
+			// pattern      freebsd
+			// replacement  netbsd
+			// file         libc_freebsd_amd64.go
+			// replaced     libc_netbsd_amd64.go
+			//              01234567890123456789
+			//                        1
+			// x            5
+			file = file[:x] + replacement + file[x+len(pattern):]
+			dst := filepath.Join(dir, file)
+			b, err := os.ReadFile(path)
+			if err != nil {
+				return fmt.Errorf("reading %s: %v", path, err)
+			}
+
+			if err := os.WriteFile(dst, b, 0640); err != nil {
+				return fmt.Errorf("writing %s: %v", dst, err)
+			}
+			fmt.Printf("%s -> %s\n", path, dst)
+		}
+
+		return nil
+	}); err != nil {
+		fail(1, "%s", err)
+	}
+}