Document "-s" commandline flag for running test suites
Document "-s" commandline flag for running test suites

https://bugzilla.gnome.org/show_bug.cgi?id=769135

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