Track process uptime

kernel/syscall/proc.c

@@ -226,6 +226,8 @@ int32_t SYSCALL2(sys_proc_stat, pidx, pstat1) {
       LL_FOREACH_SAFE(p->vas, vas, vastmp) {
         stat->usemem += vas->size;
       }
+
+      hal_memcpy(&stat->time, &p->time, sizeof(p->time));
       break;
     }
   }