tech: updated xorm libs

vendor/github.com/go-xorm/builder/builder_delete.go

@@ -0,0 +1,22 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"errors"
+	"fmt"
+)
+
+func (b *Builder) deleteWriteTo(w Writer) error {
+	if len(b.tableName) <= 0 {
+		return errors.New("no table indicated")
+	}
+
+	if _, err := fmt.Fprintf(w, "DELETE FROM %s WHERE ", b.tableName); err != nil {
+		return err
+	}
+
+	return b.cond.WriteTo(w)
+}