Differences to the zh_CN.po file from the Translation Project:
- Two uses of \v were fixed.
- Missing "OPTS" translation in --riscv[=OPTS] was copied from
previous lines.
- "make update-po" was run to remove line numbers from comments.
(cherry picked from commit 68c54e45d042add64a4cb44bfc87ca74d29b87e2)
3b83577a15