sky: Initialize energest as early as possible

If energest is initialized too late, the radio is not accounted
until the first switch. This is a problem when the radio is always
listening.

platform/sky/contiki-sky-main.c

@@ -283,6 +283,10 @@ main(int argc, char **argv)
    * Hardware initialization done!
    */
 
+  /* Initialize energest first (but after rtimer)
+   */
+  energest_init();
+  ENERGEST_ON(ENERGEST_TYPE_CPU);
   
 #if WITH_TINYOS_AUTO_IDS
   node_id = TOS_NODE_ID;
@@ -418,9 +422,6 @@ main(int argc, char **argv)
   }
 #endif /* WITH_UIP */
 
-  energest_init();
-  ENERGEST_ON(ENERGEST_TYPE_CPU);
-
   watchdog_start();
 
   NETSTACK_LLSEC.bootstrap(start_network_layer);