Merge branch 'master' of https://github.com/git-l10n/git-po

By Jiang Xin (2) and Ralf Thielow (1)
via Jiang Xin
* 'master' of https://github.com/git-l10n/git-po:
  l10n: Update German translation
  l10n: Update Simplified Chinese translation
  l10n: Update git.pot (33 new, 24 deleted messages)

Author: gitster