试了覆盖更新再更改提交都不行，下面方法可行
@参考地址
- Make copy of problematic file.
- Revert.
- Unversion and add to ignore item.
- Commit.
- Owerwrite ignored file from copy.
- Add file back to SVN.
- Commit.
svn: Base checksum mismatch on
原文：https://www.cnblogs.com/yanan7890/p/13844629.html
