[template-glib] build: Use add_project_arguments()

[Patrick Griffis <pgriffis src gnome org>]

commit 560a3f8cffe5e5f0a3945a3cf5ac9f0c13660a3a
Author: Patrick Griffis <tingping tingping se>
Date:   Mon Jun 5 17:55:00 2017 -0400

    build: Use add_project_arguments()
    
    So this can be used as a subproject

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index a7c3765..38e9f26 100644
--- a/meson.build
+++ b/meson.build
@@ -35,7 +35,7 @@ configure_file(
   configuration: config_h,
 )
 
-add_global_arguments([
+add_project_arguments([
   '-DHAVE_CONFIG_H',
   '-I' + meson.build_root(),
   '-I' + join_paths(meson.source_root(), 'src'),