Readonly properties problem in declaration files

[andtii]

TypeScript Version: 2.0.6

export class Ajax {
    public static get Application_JSON(): string { return "application/json"; }
}

//generates the following in d.ts
export declare class Ajax {
    static Application_JSON: string;
}

Expected behavior:
No build errors
Actual behavior:
A build error is being thrown

[mhegazy]

Please see #10412, #6702 (comment) and #7573.