[grilo-plugins] Add glib preset to meson i18n call

[Claude Paroz <claudep src gnome org>]

commit f9f16f17d813c2559b5aa9e9dfd13d1ac7dc7a74
Author: Claude Paroz <claude 2xlibre net>
Date:   Mon Mar 26 14:43:05 2018 +0200

    Add glib preset to meson i18n call

 po/meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/po/meson.build b/po/meson.build
index ecb3495..6ea4c12 100644
--- a/po/meson.build
+++ b/po/meson.build
@@ -52,4 +52,4 @@ langs = [
 ]
 
 i18n.gettext(meson.project_name(),
-    languages: langs)
+    languages: langs, preset: 'glib')