Array expression reification for function arguments

With haxe version 3.2.1, I tried writing the following macro:

```
import haxe.macro.Expr;

class Test {
static macro function fn(args: Array) {
return macro function ($a{args}) {};
}
}
```

However, this failed with the following compile errors:

```
Test.hx:5: characters 29-30 : Unexpected {
Test.hx:5: characters 30-34 : Missing ;
Test.hx:5: characters 35-36 : Unexpected )
```