[Bugfix][API-691/API-659][Systime]Adjust time sync strategy,add RTC sync

Change-Id: I8bc18fcaa5d77a66792a8f83497d04ce77de946e
diff --git a/framework/lynq-ril-service/src/common.cpp b/framework/lynq-ril-service/src/common.cpp
index 959cd05..241420b 100755
--- a/framework/lynq-ril-service/src/common.cpp
+++ b/framework/lynq-ril-service/src/common.cpp
@@ -895,7 +895,7 @@
         return ;
 
     stime(&t);
-
+    system("hwclock -w -f /dev/rtc0");
     return;
 }
 void notifyDataSignal() {