[notification-daemon] Add more options to XGETTEXT_OPTIONS in po/Makevars

[Piotr Drąg <piotrdrag src gnome org>]

commit fd75bdd2cca010afe3ef9c7228ca200e1225a015
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Sep 12 20:01:45 2016 +0200

    Add more options to XGETTEXT_OPTIONS in po/Makevars

 po/Makevars |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/po/Makevars b/po/Makevars
index f002562..fe2defd 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -9,9 +9,12 @@ top_builddir = ..
 
 # These options get passed to xgettext.
 XGETTEXT_OPTIONS = \
+  --from-code=UTF-8 --add-comments \
   --keyword=_ --flag=_:1:pass-c-format \
   --keyword=N_ --flag=N_:1:pass-c-format \
-  --flag=error:3:c-format --flag=error_at_line:5:c-format
+  --keyword=C_:1c,2 --flag=error:3:c-format \
+  --keyword=NC_:1c,2 --flag=error_at_line:5:c-format \
+  --keyword=g_dngettext:2,3
 
 # This is the copyright holder that gets inserted into the header of the
 # $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding