Unroll arrays from arguments of inlined functions

Can we have loop unrolling in inlined functions?
```haxe
class Test {
static function main() {
test([1, 2]);
}

static inline function test(a:Array) {
for(i in a) {
trace(i);
}
}
}
```
generated output:
```js
// Generated by Haxe 4.0.0-rc.1+c951675
(function () { "use strict";
var Test = function() { };
Test.main = function() {
var a = [1,2];
var _g = 0;
while(_g < a.length) console.log("root/program/Test.hx:8:",a[_g++]);
};
Test.main();
})();
```
http://try-haxe.mrcdk.com/#9170b