[gnome-shell-extensions] Add more options to XGETTEXT_OPTIONS in po/Makevars

[Piotr Drąg <piotrdrag src gnome org>]

commit 76a55e9b897dfc851e509b4c7776d0669f3c2bc4
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Sep 12 19:42:56 2016 +0200

    Add more options to XGETTEXT_OPTIONS in po/Makevars

 po/Makevars |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/po/Makevars b/po/Makevars
index 2c670f3..cc7503d 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -10,7 +10,7 @@ top_builddir = ..
 # These options get passed to xgettext.
 XGETTEXT_OPTIONS = --from-code=UTF-8 --keyword=_ --keyword=N_ \
         --keyword=C_:1c,2 --keyword=NC_:1c,2 \
-        --keyword=g_dngettext:2,3 \
+        --keyword=g_dngettext:2,3 --add-comments \
         --flag=g_dngettext:2:pass-c-format \
         --flag=g_strdup_printf:1:c-format \
         --flag=g_string_printf:2:c-format \