[L10N] Kickoff of translation for Git 2.10.0 round 2

Hi,

Git v2.10.0-rc2 has been released, and let's start new round of git l10n.
This time there are 12 updated messages need lto be translated since last
update:

    l10n: git.pot: v2.10.0 round 2 (12 new, 44 removed)

    Generate po/git.pot from v2.10.0-rc2 for git v2.10.0 l10n round 2.

    Signed-off-by: Jiang Xin [off-list ref]

You can get it from the usual place:

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

As how to update your XX.po and help to translate Git, please see
"Updating a XX.po file" and other sections in “po/README" file.

--
Jiang Xin