chore: add license

Signed-off-by: yuluo-yx <yuluo08290126@gmail.com>

Author: yuluo-yx

database/gdb/gdb_z_like_escape_test.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package gdb_test
 
 import (