meson: use add_project_arguments() instead of add_global_arguments()
meson: use add_project_arguments() instead of add_global_arguments()

add_global_arguments() doesn't work if the project is used as a
subproject.

endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib