l10n: fr.po: hotfix for commit 6b388fc

Fix many typos and add some new translations (1277/2080 messages
translated).

Closes git-l10n/pull/63.

Signed-off-by: Sebastien Helleu <flashcode@flashtux.org>
Signed-off-by: Jean-Noel Avila <jn.avila@free.fr>
Signed-off-by: Jiang Xin <worldhello.net@gmail.com>

Author: flashcode

po/TEAMS

@@ -15,6 +15,7 @@ Members:	Thomas Rast <trast@student.ethz.ch>
 Language:	fr (French)
 Repository:	https://github.com/jnavila/git
 Leader:		Jean-Noël Avila <jn.avila@free.fr>
+Members:	Sébastien Helleu <flashcode@flashtux.org>
 
 Language:	is (Icelandic)
 Leader:		Ævar Arnfjörð Bjarmason <avarab@gmail.com>