Fixed deprecated stime() usage in syscall

From AFLplusplus 6e8f249

Author: andreafioraldi

linux-user/syscall.c

@@ -7664,10 +7664,12 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
 #ifdef TARGET_NR_stime /* not on alpha */
     case TARGET_NR_stime:
         {
-            time_t host_time;
-            if (get_user_sal(host_time, arg1))
+            struct timespec ts;
+            ts.tv_nsec = 0;
+            if (get_user_sal(ts.tv_sec, arg1)) {
                 return -TARGET_EFAULT;
-            return get_errno(stime(&host_time));
+            }
+            return get_errno(clock_settime(CLOCK_REALTIME, &ts));
         }
 #endif
 #ifdef TARGET_NR_alarm /* not on alpha */