I18n: Update translation ru (100%).

7 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Update libtool version to reflect dropped symbols (bug #10737)

The removed symbols are xfce_strjoin, xfce_putenv, xfce_setenv and
xfce_unsetenv. They were dropped back in 2012 (commit e61d1301) but
the libtool version hasn't been bumped since.
I18n: Update translation fr (100%).

7 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).