Update nanostack-hal-cmsis-rtos.

Author: Seppo Takalo

features/FEATURE_IPV6/nanostack-hal-mbed-cmsis-rtos/mbed_lib.json

@@ -4,6 +4,10 @@
         "nvm_cfstore": {
             "help": "Use cfstore as a NVM storage. Else RAM simulation will be used",
             "value": false
+        },
+        "event_loop_thread_stack_size": {
+            "help": "Define event-loop thread stack size.",
+            "value": 6144
         }
     }
 }

features/FEATURE_IPV6/nanostack-hal-mbed-cmsis-rtos/ns_event_loop.c

@@ -16,7 +16,7 @@ static void event_loop_thread(const void *arg);
 
 // 1K should be enough - it's what the SAM4E port uses...
 // What happened to the instances parameter?
-static osThreadDef(event_loop_thread, osPriorityNormal, /*1,*/ 6*1024);
+static osThreadDef(event_loop_thread, osPriorityNormal, /*1,*/ MBED_CONF_NANOSTACK_HAL_EVENT_LOOP_THREAD_STACK_SIZE);
 static osMutexDef(event);
 
 static osThreadId event_thread_id;