[TS] fix incorrect reverse order when writting array of structs

[sssooonnnggg]

When writting array of structs to flatbuffer in TS, structs will be written in reverse order.

Example code:

struct Vec3 {
    x: float;
    y: float;
    z: float;
}

table Pos {
    vecs: [Vec3];
}

import { Pos, PosT } from './pos'
import { Vec3T } from './vec3'
import * as flatbuffers from 'flatbuffers'

let origin = new PosT();
origin.vecs = [
    new Vec3T(1, 2, 3),
    new Vec3T(4, 5, 6)
];

console.log('origin:', origin);

let builder = new flatbuffers.Builder();
builder.finish(origin.pack(builder));

let decoded = Pos.getRootAsPos(builder.dataBuffer()).unpack();
console.log('decoded:', decoded);

Will output:

origin: PosT {
  vecs: [ Vec3T { x: 1, y: 2, z: 3 }, Vec3T { x: 4, y: 5, z: 6 } ]
}
decoded: PosT {
  vecs: [ Vec3T { x: 4, y: 5, z: 6 }, Vec3T { x: 1, y: 2, z: 3 } ]
}

Because createObjectOffsetList writes data in reverse order, and many generated codes depend on it. So we need to reverse createStructOffsetList’s input to make the structs order correct.

[sssooonnnggg]

@dbaileychess @bjornharrtell

[dbaileychess]

Sorry for the delay. Can we get a test for it?

[sssooonnnggg]

Sorry for the delay. Can we get a test for it?

Ok, I will add a test later.

[sssooonnnggg]

Sorry for the delay. Can we get a test for it?

Done. 😄

[dbaileychess]

Sorry for the delay! Thanks.