Bug【87624】rtc time set for ntp_nitz_gnss time

Change-Id: I583c8ed65df644c9c9df0065953e82e416b666ea
diff --git a/mbtk/mbtk_gnssd/gnss_main.c b/mbtk/mbtk_gnssd/gnss_main.c
index 33fd1d6..76971c3 100755
--- a/mbtk/mbtk_gnssd/gnss_main.c
+++ b/mbtk/mbtk_gnssd/gnss_main.c
@@ -543,7 +543,8 @@
         mbtk_gnss_time_set_flag = 0;
     } else {
         LOGD("%s: , Set time success \n", __func__);
-	mbtk_gnss_time_set_flag = 1;
+        system("hwclock -w rtc0");
+        mbtk_gnss_time_set_flag = 1;
     }
 
     return 0;