[gdm] Added the Czech language

[Marek Černocký <mcernocky src gnome org>]

commit a5d2b1c5c130b6c8c58ec9c9d38c2714a18fc8f0
Author: Marek Černocký <marek manet cz>
Date:   Tue Apr 7 22:21:52 2015 +0200

    Added the Czech language

 docs/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/Makefile.am b/docs/Makefile.am
index 58f762d..1f8435b 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -6,4 +6,4 @@ HELP_FILES = \
        index.docbook   \
        legal.xml
 
-HELP_LINGUAS = ca de el en_GB es fr gl hu id it ko oc pt_BR ru sl sv te uk zh_CN
+HELP_LINGUAS = ca cs de el en_GB es fr gl hu id it ko oc pt_BR ru sl sv te uk zh_CN