* Add printingAdd print time for wamrc, fix posix mmap bug time for wamrc, fixed a posix mmap bug. Change-Id: Ib6517b8a69cf022a1a6a74efa1f98155aec143bc * Add a basic sample to show how native runtime invokes wasm app in WAMR, and how wasm app invokes native functions. Change-Id: I700ae413ad5e9ea04540d5187952305e1ee92d73