Call the ‘first-binding’ function for xbindkeys

All of the top-level key bindings have been put into this one function, so I
need to call it to actually enable the keybindings.

oni/home/services/xbindkeys.scm

@@ -70,7 +70,8 @@
             (map (lambda (key-pair)
                    (format #f "  (xbindkey (quote ~s) ~s) \n" (car key-pair) (cdr key-pair)))
                  others)
-            (list "  )\n")))))
+            (list "  )\n"
+                  "(first-binding)\n")))))
 
 (define (add-xbindkeys-packages config)
   (list (home-xbindkeys-configuration-package config)))