gnome-games, chess: Strings accidentally not marked for translation

[Robert Ancell <robert ancell gmail com>]

Hi,

I just enabled some strings [1] for translation in Chess (gnome-games)
that were accidentally unmarked for translation.  These strings are:
"Save Chess Game"
"Load Chess Game"
"PGN files"
"All files"

These strings are the same as they were in 2.32 and most .po files
still have the translations there.  Some po files have the
translations commented out and will need to be re-enabled for 3.0.1.

Thanks,
--Robert

[1] http://git.gnome.org/browse/gnome-games/commit/?h=gnome-3-0&id=65b15ac10d028fc99347582e8561b07be993397d