Bug#978736: diffutils: Please fix some critical zh_CN translation errors

[Santiago Vila]

Hmm, no, don't worry. A repack should not be required.

I plan to do something like this:

override_dh_auto_build:
        dh_auto_build
        $(MAKE) -C po update-gmo

but I have not tested it yet (I have been updating the Spanish
translation, which had several errors...).

Thanks.