Quick fix imports added before hashbang

[mjbvz]

From microsoft/vscode#38541

TypeScript Version: 2.7.0-dev.20171116

Code
In a project:

x.ts:

export const abc = 123

main.ts:

#!/usr/bin/env node

abc

Trigger a quick fix to add a missing import on abc

Expected behavior:
#!/usr/bin/env node
import { abc } from "./y";
abc

Actual behavior:
Import added before the hashbang

import { abc } from "./y";

#!/usr/bin/env node

abc