build: Install keybinding files for control-center

As some keybindings are now provided by gnome-shell rather than
mutter, it makes sense to expose those in System Settings.

https://bugzilla.gnome.org/show_bug.cgi?id=671010

src/main.c

@@ -37,6 +37,9 @@ extern GType gnome_shell_plugin_get_type (void);
 
 #define OVERRIDES_SCHEMA "org.gnome.shell.overrides"
 
+#define WM_NAME "GNOME Shell"
+#define GNOME_WM_KEYBINDINGS "Metacity,Mutter,GNOME Shell"
+
 static gboolean is_gdm_mode = FALSE;
 static char *session_mode = NULL;
 
@@ -374,6 +377,9 @@ main (int argc, char **argv)
 
   meta_plugin_manager_set_plugin_type (gnome_shell_plugin_get_type ());
 
+  meta_set_wm_name (WM_NAME);
+  meta_set_gnome_wm_keybindings (GNOME_WM_KEYBINDINGS);
+
   /* Prevent meta_init() from causing gtk to load gail and at-bridge */
   g_setenv ("NO_AT_BRIDGE", "1", TRUE);
   meta_init ();