samples/native-lib: use the same shared lib name as product-mini (#1669)
samples/native-lib: use the same shared lib name as product-mini (#1669)

Use the shared lib name `libiwasm` instead of static lib name `vmlib`
bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime