l10n: git.pot: v1.8.3 round 2 (44 new, 12 removed)

Generate po/git.pot from v1.8.3-rc0-19-g7e6a0 for git v1.8.3
l10n round 2.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>

Author: jiangxin