[L10N] Kickoff of translation for Git 2.16.0 round 1

Hi guys,

Happy new year.

New round of Git l10n is coming. It's time to start l10n for Git 2.16.0.
This time there are 64 updated messages need to be translated since last
update:

    l10n: git.pot: v2.16.0 round 1 (64 new, 25 removed)

    Generate po/git.pot from v2.16.0-rc0 for git v2.16.0 l10n round 1.

    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