@Import does't work

de.inetsoftware.jwebassembly.api.annotation.Import Does not include the import function definition, is it currently not supported?

demo: https://github.com/zonghaishang/wasm-java/tree/jwebassembly

```
package com.alipay.wasm;

import de.inetsoftware.jwebassembly.JWebAssembly;
import de.inetsoftware.jwebassembly.api.annotation.Export;
import de.inetsoftware.jwebassembly.api.annotation.Import;

import java.io.File;
import java.net.URL;

public class WasmFunctions {

@Export
public static int hello() {
return 43;
}

// does't work ??

@Import
public static native int max(int a, int b) ;

public static void main(String[] args) {
File file = new File("build/test.wasm");
JWebAssembly wasm = new JWebAssembly();

Class clazz = WasmFunctions.class;
URL url = clazz.getResource("/" + clazz.getName().replace(".", "/") + ".class");
wasm.addFile(url);

System.out.println(wasm.compileToText());

wasm.compileToBinary(file);
}
}
```

```
➜ build git:(jwebassembly) ✗ wasm-objdump -x test.wasm -j Import

test.wasm: file format wasm 0x1

Section Details:

Section not found: Import

```

```
➜ build git:(jwebassembly) ✗ wasm-objdump -x test.wasm

test.wasm: file format wasm 0x1

Section Details:

Type[1]:
- type[0] () -> i32
Function[1]:
- func[0] sig=0
Export[1]:
- func[0] -> "hello"
Code[1]:
- func[0] size=5
Custom:
- name: "producers"

```

```
➜ build git:(jwebassembly) ✗ wasm-objdump -x test.wasm -j Export

test.wasm: file format wasm 0x1

Section Details:

Export[1]:
- func[0] -> "hello"
```