Increase too small maximum root path length (ARMmbed#1737)

Author: katariinaliehu

source/6LoWPAN/Thread/thread_nvm_store.c

@@ -84,7 +84,7 @@ static int thread_nvm_store_fast_data_save(thread_nvm_fast_data_t* fast_data_to_
 static int thread_nvm_store_all_counters_store(uint32_t mac_frame_counter, uint32_t mle_frame_counter, uint32_t seq_counter);
 static void thread_nvm_store_link_info_delayed_write(uint32_t seconds);
 
-#define MAX_ROOT_PATH_LEN 150
+#define MAX_ROOT_PATH_LEN 200
 
 #define FAST_DATA_STRING_LEN (strlen(FAST_DATA_FILE)+strlen(thread_nvm_store_get_root_path())+1)
 #define ACTIVE_CONF_STRING_LEN (strlen(THREAD_NVM_ACTIVE_CONF_FILE)+strlen(thread_nvm_store_get_root_path())+1)