Merge https://github.com/git-l10n/git-po

Updates to localized messages for zn_CN and sv locales.

via Jiang Xin
* https://github.com/git-l10n/git-po:
  l10n: Improve zh_CN translation for msg "not something we can merge"
  l10n: Improve zh_CN trans for msg that cannot fast-forward
  l10n: Update zh_CN translation for 1.7.10-rc0
  Update Swedish translation (732t0f0u).
  po/sv.po: add Swedish translation
  l10n: Update git.pot (1 new message)
  l10n: Update zh_CN translation for 1.7.9.2
  l10n: Improve commit msg for zh_CN translation
  l10n: Improve zh_CN translation for msg that make empty commit when amend.
  l10n: Improve zh_CN translation for empty cherry-pick msg.
  l10n: Improve zh_CN translation for msg about branch deletion deny
  l10n: Improve zh_CN translation for lines insertion and deletion.