[gnome-clocks] build: fix X-Geoclue-Reason extraction

[Piotr Drąg <piotrdrag src gnome org>]

commit c3c0d8f62724b1a86604fd63786d4fe84b47a4e2
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Feb 21 16:46:11 2018 +0100

    build: fix X-Geoclue-Reason extraction
    
    https://bugzilla.gnome.org/show_bug.cgi?id=793677

 po/meson.build |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/po/meson.build b/po/meson.build
index e9b77d7..09a3115 100644
--- a/po/meson.build
+++ b/po/meson.build
@@ -1 +1,2 @@
-i18n.gettext(meson.project_name(), preset: 'glib')
+i18n.gettext(meson.project_name(), preset: 'glib',
+             args: [ '--keyword=X-Geoclue-Reason' ])